(S) A severe warning (mandatory).
(F) A fatal error (trappable).
(P) An internal error you should never see (trappable).
- (X) A very fatal error (non-trappable).
+ (X) A very fatal error (nontrappable).
(A) An alien error message (not generated by Perl).
Optional warnings are enabled by using the B<-w> switch. Warnings may
-be captured by setting C<$SIG{__WARN__}> to a reference to a routine that will be
-called on each warning instead of printing it. See L<perlvar>.
+be captured by setting C<$SIG{__WARN__}> to a reference to a routine that
+will be called on each warning instead of printing it. See L<perlvar>.
Trappable errors may be trapped using the eval operator. See
L<perlfunc/eval>.
Some of these messages are generic. Spots that vary are denoted with a %s,
just as in a printf format. Note that some messages start with a %s!
-The symbols C<"%-?@> sort before the letters, while C<[> and C<\> sort after.
+The symbols C<"%(-?@> sort before the letters, while C<[> and C<\> sort after.
=over 4
to try to declare one with a package qualifier on the front. Use local()
if you want to localize a package variable.
-=item "my" variable %s masks earlier declaration in same scope
+=item "my" variable %s masks earlier declaration in same %s
-(S) A lexical variable has been redeclared in the same scope, effectively
-eliminating all access to the previous instance. This is almost always
-a typographical error. Note that the earlier variable will still exist
+(W) A lexical variable has been redeclared in the current scope or statement,
+effectively eliminating all access to the previous instance. This is almost
+always a typographical error. Note that the earlier variable will still exist
until the end of the scope or until all closure referents to it are
destroyed.
checksumming process loses information, and you can't go the other
way. See L<perlfunc/unpack>.
+=item /%s/: Unrecognized escape \\%c passed through
+
+(W) You used a backslash-character combination which is not recognized
+by Perl. This combination appears in an interpolated variable or a
+C<'>-delimited regular expression.
+
=item %s (...) interpreted as function
(W) You've run afoul of the rule that says that any list operator followed
instead of Perl. Check the #! line, or manually feed your script
into Perl yourself.
+=item (in cleanup) %s
+
+(W) This prefix usually indicates that a DESTROY() method raised
+the indicated exception. Since destructors are usually called by
+the system at arbitrary points during execution, and often a vast
+number of times, the warning is issued only once for any number
+of failures that would otherwise result in the same message being
+repeated.
+
+Failure of user callbacks dispatched using the C<G_KEEPERR> flag
+could also result in this warning. See L<perlcall/G_KEEPERR>.
+
+=item (Missing semicolon on previous line?)
+
+(S) This is an educated guess made in conjunction with the message "%s
+found where operator expected". Don't automatically put a semicolon on
+the previous line just because you saw this message.
+
=item B<-P> not allowed for setuid/setgid script
(F) The script would have to be opened by the C preprocessor by name,
(F) Perl can't peek at the stdio buffer of filehandles when it doesn't
know about your kind of stdio. You'll have to use a filename instead.
+=item C<-p> destination: %s
+
+(F) An error occurred during the implicit output invoked by the C<-p>
+command-line switch. (This output goes to STDOUT unless you've
+redirected it with select().)
+
=item 500 Server error
See Server error.
=item Allocation too large: %lx
-(X) You can't allocate more than 64K on an MSDOS machine.
+(X) You can't allocate more than 64K on an MS-DOS machine.
-=item Allocation too large
+=item Applying %s to %s will act on scalar(%s)
-(F) You can't allocate more than 2^31+"small amount" bytes.
+(W) The pattern match (//), substitution (s///), and transliteration (tr///)
+operators work on scalar values. If you apply one of them to an array
+or a hash, it will convert the array or hash to a scalar value -- the
+length of an array, or the population info of a hash -- and then work on
+that scalar value. This is probably not what you meant to do. See
+L<perlfunc/grep> and L<perlfunc/map> for alternatives.
=item Arg too short for msgsnd
you thought. Normally it's pretty easy to disambiguate it by supplying
a missing quote, operator, parenthesis pair or declaration.
+=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
+
+(W) A subroutine you have declared has the same name as a Perl keyword,
+and you have used the name without qualification for calling one or the
+other. Perl decided to call the builtin because the subroutine is
+not imported.
+
+To force interpretation as a subroutine call, either put an ampersand
+before the subroutine name, or qualify the name with its package.
+Alternatively, you can import the subroutine (or pretend that it's
+imported with the C<use subs> pragma).
+
+To silently interpret it as the Perl operator, use the C<CORE::> prefix
+on the operator (e.g. C<CORE::log($x)>) or by declaring the subroutine
+to be an object method (see L<attrs>).
+
=item Args must match #! line
(F) The setuid emulator requires that the arguments Perl was invoked
be garbage collected on exit. An SV was discovered to be outside any
of those arenas.
-=item Attempt to free non-existent shared string
+=item Attempt to free nonexistent shared string
(P) Perl maintains a reference counted internal table of strings to
optimize the storage and access of hash keys and other strings. This
SvREFCNT_inc() was called too few times, or that the SV was mortalized
when it shouldn't have been, or that memory has been corrupted.
+=item Attempt to pack pointer to temporary value
+
+(W) You tried to pass a temporary value (like the result of a
+function, or a computed expression) to the "p" pack() template. This
+means the result contains a pointer to a location that could become
+invalid anytime, even before the end of the current statement. Use
+literals or global values as arguments to the "p" pack() template to
+avoid this warning.
+
=item Attempt to use reference as lvalue in substr
(W) You supplied a reference as the first argument to substr() used
(P) One of the internal hash routines was passed a null HV pointer.
+=item Bad index while coercing array into hash
+
+(F) The index looked up in the hash found as the 0'th element of a
+pseudo-hash is not legal. Index values must be at 1 or greater.
+See L<perlref>.
+
=item Bad name after %s::
(F) You started to name a symbol by using a package prefix, and then didn't
of Perl. Check the #! line, or manually feed your script into
Perl yourself.
+=item Bareword "%s" not allowed while "strict subs" in use
+
+(F) With "strict subs" in use, a bareword is only allowed as a
+subroutine identifier, in curly braces or to the left of the "=>" symbol.
+Perhaps you need to predeclare a subroutine?
+
+=item Bareword "%s" refers to nonexistent package
+
+(W) You used a qualified bareword of the form C<Foo::>, but
+the compiler saw no other uses of that namespace before that point.
+Perhaps you need to predeclare a package?
+
=item BEGIN failed--compilation aborted
(F) An untrapped exception was raised while executing a BEGIN subroutine.
Compilation stops immediately and the interpreter is exited.
+=item BEGIN not safe after errors--compilation aborted
+
+(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
+implies a C<BEGIN {}>) after one or more compilation errors had
+already occurred. Since the intended environment for the C<BEGIN {}>
+could not be guaranteed (due to the errors), and since subsequent code
+likely depends on its correct operation, Perl just gave up.
+
=item bind() on closed fd
(W) You tried to do a bind on a closed socket. Did you forget to check
occurs if you tried to jump out of a sort() block or subroutine, which
is a no-no. See L<perlfunc/goto>.
+=item Can't "goto" into the middle of a foreach loop
+
+(F) A "goto" statement was executed to jump into the middle of a
+foreach loop. You can't get there from here. See L<perlfunc/goto>.
+
=item Can't "last" outside a block
(F) A "last" statement was executed to break out of the current block,
there isn't a current block. Note that an "if" or "else" block doesn't
count as a "loopish" block, as doesn't a block given to sort(). You can
usually double the curlies to get the same effect though, because the inner
-curlies will be considered a block that loops once. See L<perlfunc/last>.
+curlies will be considered a block that loops once. See L<perlfunc/next>.
=item Can't "redo" outside a block
there isn't a current block. Note that an "if" or "else" block doesn't
count as a "loopish" block, as doesn't a block given to sort(). You can
usually double the curlies to get the same effect though, because the inner
-curlies will be considered a block that loops once. See L<perlfunc/last>.
+curlies will be considered a block that loops once. See L<perlfunc/redo>.
=item Can't bless non-reference value
=item Can't break at that line
-(S) A warning intended for while running within the debugger, indicating
+(S) A warning intended to only be printed while running within the debugger, indicating
the line number specified wasn't the location of a statement that could
be stopped at.
=item Can't call method "%s" on unblessed reference
-(F) A method call must know what package it's supposed to run in. It
+(F) A method call must know in what package it's supposed to run. It
ordinarily finds this out from the object reference you supply, but
you didn't supply an object reference in this case. A reference isn't
an object reference until it has been blessed. See L<perlobj>.
(F) You used the syntax of a method call, but the slot filled by the
object reference or package name contains an expression that returns
-neither an object reference nor a package name. (Perhaps it's null?)
+a defined value which is neither an object reference nor a package name.
+Something like this will reproduce the error:
+
+ $BADREF = 42;
+ process $BADREF 1,2,3;
+ $BADREF->process(1,2,3);
+
+=item Can't call method "%s" on an undefined value
+
+(F) You used the syntax of a method call, but the slot filled by the
+object reference or package name contains an undefined value.
Something like this will reproduce the error:
$BADREF = undef;
(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
that you can chdir to, possibly because it doesn't exist.
+=item Can't check filesystem of script "%s"
+
+(P) For some reason you can't check the filesystem of the script for nosuid.
+
=item Can't coerce %s to integer in %s
(F) Certain types of SVs, in particular real symbol table entries
(F) Certain types of SVs, in particular real symbol table entries
(typeglobs), can't be forced to stop being what they are.
+=item Can't coerce array into hash
+
+(F) You used an array where a hash was expected, but the array has no
+information on how to map from keys to array indices. You can do that
+only with arrays that have a hash reference at index 0.
+
=item Can't create pipe mailbox
(P) An error peculiar to VMS. The process is suffering from exhausted quotas
(S) The creation of the new file failed for the indicated reason.
-=item Can't do in-place edit without backup
+=item Can't do inplace edit without backup
-(F) You're on a system such as MSDOS that gets confused if you try reading
-from a deleted (but still opened) file. You have to say B<-i>C<.bak>, or some
+(F) You're on a system such as MS-DOS that gets confused if you try reading
+from a deleted (but still opened) file. You have to say C<-i.bak>, or some
such.
=item Can't do inplace edit: %s E<gt> 14 characters
=item Can't execute %s
+(F) You used the B<-S> switch, but the copies of the script to execute found
+in the PATH did not have correct permissions.
+
+=item Can't find %s on PATH, '.' not in PATH
+
+(F) You used the B<-S> switch, but the script to execute could not be found
+in the PATH, or at least not with the correct permissions. The script
+exists in the current directory, but PATH prohibits running it.
+
+=item Can't find %s on PATH
+
(F) You used the B<-S> switch, but the script to execute could not be found
-in the PATH, or at least not with the correct permissions.
+in the PATH.
=item Can't find label %s
the closing delimiter was omitted. Because bracketed quotes count nesting
levels, the following is missing its final parenthesis:
- print q(The character '(' starts a side comment.)
+ print q(The character '(' starts a side comment.);
+
+If you're getting this error from a here-document, you may have
+included unseen whitespace before or after your closing tag. A good
+programmer's editor will have a way to help you find these characters.
=item Can't fork
(F) A fatal error occurred while trying to fork while opening a pipeline.
-=item Unsupported function fork
-
-(F) Your version of executable does not support forking.
-
-Note that under some systems, like OS/2, there may be different flavors of
-Perl executables, some of which may support fork, some not. Try changing
-the name you call Perl by to C<perl_>, C<perl__>, and so on.
-
=item Can't get filespec - stale stat buffer?
(S) A warning peculiar to VMS. This arises because of the difference between
you should be calling it out of only an AUTOLOAD routine anyway. See
L<perlfunc/goto>.
-=item Can't localize a reference
+=item Can't goto subroutine from an eval-string
-(F) You said something like C<local $$ref>, which is not allowed because
-the compiler can't determine whether $ref will end up pointing to anything
-with a symbol table entry, and a symbol table entry is necessary to
-do a local.
+(F) The "goto subroutine" call can't be used to jump out of an eval "string".
+(You can use it to jump out of an eval {BLOCK}, but you probably don't want to.)
+
+=item Can't localize through a reference
+
+(F) You said something like C<local $$ref>, which Perl can't currently
+handle, because when it goes to restore the old value of whatever $ref
+pointed to after the scope of the local() is finished, it can't be
+sure that $ref will still be a reference.
=item Can't localize lexical variable %s
localize a package variable of the same name, qualify it with the
package name.
+=item Can't localize pseudo-hash element
+
+(F) You said something like C<local $ar-E<gt>{'key'}>, where $ar is
+a reference to a pseudo-hash. That hasn't been implemented yet, but
+you can get a similar effect by localizing the corresponding array
+element directly -- C<local $ar-E<gt>[$ar-E<gt>[0]{'key'}]>.
+
+=item Can't locate auto/%s.al in @INC
+
+(F) A function (or method) was called in a package which allows autoload,
+but there is no function to autoload. Most probable causes are a misprint
+in a function/method name or a failure to C<AutoSplit> the file, say, by
+doing C<make install>.
+
=item Can't locate %s in @INC
(F) You said to do (or require, or use) a file that couldn't be found
-in any of the libraries mentioned in @INC. Perhaps you need to set
-the PERL5LIB environment variable to say where the extra library is,
-or maybe the script needs to add the library name to @INC. Or maybe
+in any of the libraries mentioned in @INC. Perhaps you need to set the
+PERL5LIB or PERL5OPT environment variable to say where the extra library
+is, or maybe the script needs to add the library name to @INC. Or maybe
you just misspelled the name of the file. See L<perlfunc/require>.
=item Can't locate object method "%s" via package "%s"
(W) The @ISA array contained the name of another package that doesn't seem
to exist.
-=item Can't mktemp()
+=item Can't make list assignment to \%ENV on this system
-(F) The mktemp() routine failed for some reason while trying to process
-a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
+(F) List assignment to %ENV is not supported on some systems, notably VMS.
=item Can't modify %s in %s
(F) You aren't allowed to assign to the item indicated, or otherwise try to
change it, such as with an auto-increment.
-=item Can't modify non-existent substring
+=item Can't modify nonexistent substring
(P) The internal routine that does assignment to a substr() was handed
a NULL.
=item Can't open %s: %s
-(S) An inplace edit couldn't open the original file for the indicated reason.
-Usually this is because you don't have read permission for the file.
+(S) The implicit opening of a file through use of the C<E<lt>E<gt>>
+filehandle, either implicitly under the C<-n> or C<-p> command-line
+switches, or explicitly, failed for the indicated reason. Usually this
+is because you don't have read permission for a file which you named
+on the command line.
=item Can't open bidirectional pipe
(F) The script you specified can't be opened for the indicated reason.
+=item Can't redefine active sort subroutine %s
+
+(F) Perl optimizes the internal handling of sort subroutines and keeps
+pointers into them. You tried to redefine one such sort subroutine when it
+was currently active, which is not allowed. If you really want to do
+this, you should write C<sort { &func } @x> instead of C<sort func @x>.
+
=item Can't rename %s to %s: %s, skipping file
(S) The rename done by the B<-i> switch failed for some reason, probably because
=item Can't take log of %g
-(F) Logarithms are defined on only positive real numbers.
+(F) For ordinary real numbers, you can't take the logarithm of a
+negative number or zero. There's a Math::Complex package that comes
+standard with Perl, though, if you really want to do that for
+the negative numbers.
=item Can't take sqrt of %g
(F) For ordinary real numbers, you can't take the square root of a
-negative number. There's a Complex package available for Perl, though,
-if you really want to do that.
+negative number. There's a Math::Complex package that comes standard
+with Perl, though, if you really want to do that.
=item Can't undef active subroutine
of upgradability. Upgrading to undef indicates an error in the
code calling sv_upgrade.
+=item Can't use %%! because Errno.pm is not available
+
+(F) The first time the %! hash is used, perl automatically loads the
+Errno.pm module. The Errno module is expected to tie the %! hash to
+provide symbolic names for C<$!> errno values.
+
=item Can't use "my %s" in sort comparison
(F) The global variables $a and $b are reserved for sort comparisons.
=item Can't use an undefined value as %s reference
(F) A value used as either a hard reference or a symbolic reference must
-be a defined value. This helps to de-lurk some insidious errors.
+be a defined value. This helps to delurk some insidious errors.
=item Can't use global %s in "my"
subscript. But to the left of the brackets was an expression that
didn't look like an array reference, or anything else subscriptable.
-=item Can't write to temp file for B<-e>: %s
-
-(F) The write routine failed for some reason while trying to process
-a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
-
=item Can't x= to read-only value
(F) You tried to repeat a constant value (often the undefined value) with
an assignment operator, which implies modifying the value itself.
Perhaps you need to copy the value to a temporary, and repeat that.
-=item Cannot open temporary file
+=item Cannot find an opnumber for "%s"
-(F) The create routine failed for some reason while trying to process
-a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
+(F) A string of a form C<CORE::word> was given to prototype(), but
+there is no builtin with the name C<word>.
=item Cannot resolve method `%s' overloading `%s' in package `%s'
opposed to a subroutine reference): no such method callable via the
package. If method name is C<???>, this is an internal error.
+=item Character class syntax [. .] is reserved for future extensions
+
+(W) Within regular expression character classes ([]) the syntax beginning
+with "[." and ending with ".]" is reserved for future extensions.
+If you need to represent those character sequences inside a regular
+expression character class, just quote the square brackets with the
+backslash: "\[." and ".\]".
+
+=item Character class syntax [: :] is reserved for future extensions
+
+(W) Within regular expression character classes ([]) the syntax beginning
+with "[:" and ending with ":]" is reserved for future extensions.
+If you need to represent those character sequences inside a regular
+expression character class, just quote the square brackets with the
+backslash: "\[:" and ":\]".
+
+=item Character class syntax [= =] is reserved for future extensions
+
+(W) Within regular expression character classes ([]) the syntax
+beginning with "[=" and ending with "=]" is reserved for future extensions.
+If you need to represent those character sequences inside a regular
+expression character class, just quote the square brackets with the
+backslash: "\[=" and "=\]".
+
=item chmod: mode argument is missing initial 0
(W) A novice will sometimes say
(W) You tried to close a filehandle that was never opened.
+=item Compilation failed in require
+
+(F) Perl could not compile a file specified in a C<require> statement.
+Perl uses this generic message when none of the errors that it encountered
+were severe enough to halt compilation immediately.
+
+=item Complex regular subexpression recursion limit (%d) exceeded
+
+(W) The regular expression engine uses recursion in complex situations
+where back-tracking is required. Recursion depth is limited to 32766,
+or perhaps less in architectures where the stack cannot grow
+arbitrarily. ("Simple" and "medium" situations are handled without
+recursion and are not subject to a limit.) Try shortening the string
+under examination; looping in Perl code (e.g. with C<while>) rather
+than in the regular expression engine; or rewriting the regular
+expression so that it is simpler or backtracks less. (See L<perlbook>
+for information on I<Mastering Regular Expressions>.)
+
=item connect() on closed fd
(W) You tried to do a connect on a closed socket. Did you forget to check
the return value of your socket() call? See L<perlfunc/connect>.
+=item Constant is not %s reference
+
+(F) A constant value (perhaps declared using the C<use constant> pragma)
+is being dereferenced, but it amounts to the wrong type of reference. The
+message indicates the type of reference that was expected. This usually
+indicates a syntax error in dereferencing the constant value.
+See L<perlsub/"Constant Functions"> and L<constant>.
+
=item Constant subroutine %s redefined
(S) You redefined a subroutine which had previously been eligible for
inlining. See L<perlsub/"Constant Functions"> for commentary and
workarounds.
+=item Constant subroutine %s undefined
+
+(S) You undefined a subroutine which had previously been eligible for
+inlining. See L<perlsub/"Constant Functions"> for commentary and
+workarounds.
+
=item Copy method did not return a reference
(F) The method which overloads "=" is buggy. See L<overload/Copy Constructor>.
=item Deep recursion on subroutine "%s"
(W) This subroutine has called itself (directly or indirectly) 100
-times than it has returned. This probably indicates an infinite
+times more than it has returned. This probably indicates an infinite
recursion, unless you're writing strange benchmark programs, in which
case it indicates something else.
+=item Delimiter for here document is too long
+
+(F) In a here document construct like C<E<lt>E<lt>FOO>, the label
+C<FOO> is too long for Perl to handle. You have to be seriously
+twisted to write code that triggers this error.
+
=item Did you mean &%s instead?
(W) You probably referred to an imported subroutine &FOO as $FOO or some such.
(F) You passed die() an empty string (the equivalent of C<die "">) or
you called it with no args and both C<$@> and C<$_> were empty.
-=item Do you need to pre-declare %s?
+=item Do you need to predeclare %s?
(S) This is an educated guess made in conjunction with the message "%s
found where operator expected". It often means a subroutine or module
(F) An untrapped exception was raised while executing an END subroutine.
The interpreter is immediately exited.
+=item entering effective %s failed
+
+(F) While under the C<use filetest> pragma, switching the real and
+effective uids or gids failed.
+
=item Error converting file specification %s
(F) An error peculiar to VMS. Because Perl may have to deal with file
passed an invalid file specification to Perl, or you've found a
case the conversion routines don't handle. Drat.
+=item %s: Eval-group in insecure regular expression
+
+(F) Perl detected tainted data when trying to compile a regular expression
+that contains the C<(?{ ... })> zero-width assertion, which is unsafe.
+See L<perlre/(?{ code })>, and L<perlsec>.
+
+=item %s: Eval-group not allowed, use re 'eval'
+
+(F) A regular expression contained the C<(?{ ... })> zero-width assertion,
+but that construct is only allowed when the C<use re 'eval'> pragma is
+in effect. See L<perlre/(?{ code })>.
+
+=item %s: Eval-group not allowed at run time
+
+(F) Perl tried to compile a regular expression containing the C<(?{ ... })>
+zero-width assertion at run time, as it would when the pattern contains
+interpolated values. Since that is a security risk, it is not allowed.
+If you insist, you may still do this by explicitly building the pattern
+from an interpolated string at run time and using that in an eval().
+See L<perlre/(?{ code })>.
+
+=item Excessively long <> operator
+
+(F) The contents of a <> operator may not exceed the maximum size of a
+Perl identifier. If you're just trying to glob a long list of
+filenames, try using the glob() operator, or put the filenames into a
+variable and glob that.
+
=item Execution of %s aborted due to compilation errors
(F) The final summary message when a Perl compilation fails.
(W) You are exiting a substitution by unconventional means, such as
a return, a goto, or a loop control statement.
+=item Explicit blessing to '' (assuming package main)
+
+(W) You are blessing a reference to a zero length string. This has
+the effect of blessing the reference into the package main. This is
+usually not what you want. Consider providing a default target
+package, e.g. bless($ref, $p || 'MyPackage');
+
=item Fatal VMS error at %s, line %d
(P) An error peculiar to VMS. Something untoward happened in a VMS system
(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
C<getpwnam> operator returned an invalid UIC.
-
=item Glob not terminated
(F) The lexer saw a left angle bracket in a place where it was expecting
=item Global symbol "%s" requires explicit package name
-(F) You've said "use strict vars", which indicates that all variables must
-either be lexically scoped (using "my"), or explicitly qualified to
+(F) You've said "use strict vars", which indicates that all variables
+must either be lexically scoped (using "my"), or explicitly qualified to
say which package the global variable is in (using "::").
=item goto must have label
(D) Really old Perl let you omit the % on hash names in some spots. This
is now heavily deprecated.
+=item Identifier too long
+
+(F) Perl limits identifiers (names for variables, functions, etc.) to
+about 250 characters for simple names, and somewhat more for compound
+names (like C<$A::B>). You've exceeded Perl's limits. Future
+versions of Perl are likely to eliminate these arbitrary limitations.
+
=item Ill-formed logical name |%s| in prime_env_iter
(W) A warning peculiar to VMS. A logical name was encountered when preparing
to iterate over %ENV which violates the syntactic rules governing logical
names. Because it cannot be translated normally, it is skipped, and will not
appear in %ENV. This may be a benign occurrence, as some software packages
-might directly modify logical name tables and introduce non-standard names,
+might directly modify logical name tables and introduce nonstandard names,
or it may indicate that a logical name table has been corrupted.
=item Illegal character %s (carriage return)
(F) A carriage return character was found in the input. This is an
error, and not a warning, because carriage return characters can break
-here documents (e.g. C<print E<lt>E<lt>EOF;>). Note that Perl always
-opens scripts in text mode, so this error should only occur in C<eval>.
+multi-line strings, including here documents (e.g., C<print E<lt>E<lt>EOF;>).
+
+Under Unix, this error is usually caused by executing Perl code --
+either the main program, a module, or an eval'd string -- that was
+transferred over a network connection from a non-Unix system without
+properly converting the text file format.
+
+Under systems that use something other than '\n' to delimit lines of
+text, this error can also be caused by reading Perl code from a file
+handle that is in binary mode (as set by the C<binmode> operator).
+
+In either case, the Perl code in question will probably need to be
+converted with something like C<s/\x0D\x0A?/\n/g> before it can be
+executed.
=item Illegal division by zero
(W) You may have tried to use an 8 or 9 in a octal number. Interpretation
of the octal number stopped before the 8 or 9.
+=item Illegal hex digit ignored
+
+(W) You may have tried to use a character other than 0 - 9 or A - F in a
+hexadecimal number. Interpretation of the hexadecimal number stopped
+before the illegal character.
+
+=item Illegal switch in PERL5OPT: %s
+
+(X) The PERL5OPT environment variable may only be used to set the
+following switches: B<-[DIMUdmw]>.
+
+=item In string, @%s now must be written as \@%s
+
+(F) It used to be that Perl would try to guess whether you wanted an
+array interpolated or a literal @. It did this when the string was first
+used at runtime. Now strings are parsed at compile time, and ambiguous
+instances of @ must be disambiguated, either by prepending a backslash to
+indicate a literal, or by declaring (or using) the array within the
+program before the string (lexically). (Someday it will simply assume
+that an unbackslashed @ interpolates an array.)
+
=item Insecure dependency in %s
(F) You tried to do something that the tainting mechanism didn't like.
script if C<$ENV{PATH}> contains a directory that is writable by the world.
See L<perlsec>.
-=item Insecure PATH
+=item Insecure $ENV{%s} while running %s
(F) You can't use system(), exec(), or a piped open in a setuid or
-setgid script if C<$ENV{PATH}> is derived from data supplied (or
+setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
+C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or
potentially supplied) by the user. The script must set the path to a
known value, using trustworthy data. See L<perlsec>.
(S) A warning peculiar to VMS. Perl keeps track of the number
of times you've called C<fork> and C<exec>, to determine
whether the current call to C<exec> should affect the current
-script or a subprocess (see L<perlvms/exec>). Somehow, this count
+script or a subprocess (see L<perlvms/"exec LIST">). Somehow, this count
has become scrambled, so Perl is making a guess and treating
this C<exec> as a request to terminate the Perl script
and execute the specified command.
(P) Something went badly wrong in the regular expression parser.
+=item glob failed (%s)
+
+(W) Something went wrong with the external program(s) used for C<glob>
+and C<E<lt>*.cE<gt>>. Usually, this means that you supplied a C<glob>
+pattern that caused the external program to fail and exit with a nonzero
+status. If the message indicates that the abnormal exit resulted in a
+coredump, this may also mean that your csh (C shell) is broken. If so,
+you should change all of the csh-related variables in config.sh: If you
+have tcsh, make the variables refer to it as if it were csh (e.g.
+C<full_csh='/usr/bin/tcsh'>); otherwise, make them all empty (except that
+C<d_csh> should be C<'undef'>) so that Perl will think csh is missing.
+In either case, after editing config.sh, run C<./Configure -S> and
+rebuild Perl.
+
=item internal urp in regexp at /%s/
(P) Something went badly awry in the regular expression parser.
(F) The range specified in a character class had a minimum character
greater than the maximum character. See L<perlre>.
+=item Invalid conversion in %s: "%s"
+
+(W) Perl does not understand the given format conversion.
+See L<perlfunc/sprintf>.
+
+=item Invalid type in pack: '%s'
+
+(F) The given character is not a valid pack type. See L<perlfunc/pack>.
+(W) The given character is not a valid pack type but used to be silently
+ignored.
+
+=item Invalid type in unpack: '%s'
+
+(F) The given character is not a valid unpack type. See L<perlfunc/unpack>.
+(W) The given character is not a valid unpack type but used to be silently
+ignored.
+
=item ioctl is not implemented
(F) Your machine apparently doesn't implement ioctl(), which is pretty
that name, not even if you count where you were called from. See
L<perlfunc/last>.
+=item leaving effective %s failed
+
+(F) While under the C<use filetest> pragma, switching the real and
+effective uids or gids failed.
+
=item listen() on closed fd
(W) You tried to do a listen on a closed socket. Did you forget to check
the return value of your socket() call? See L<perlfunc/listen>.
-=item Literal @%s now requires backslash
-
-(F) It used to be that Perl would try to guess whether you wanted an
-array interpolated or a literal @. It did this when the string was
-first used at runtime. Now strings are parsed at compile time, and
-ambiguous instances of @ must be disambiguated, either by putting a
-backslash to indicate a literal, or by declaring (or using) the array
-within the program before the string (lexically). (Someday it will simply
-assume that an unbackslashed @ interpolates an array.)
-
=item Method for operation %s not found in package %s during blessing
(F) An attempt was made to specify an entry in an overloading table that
(F) While certain functions allow you to specify a filehandle or an
"indirect object" before the argument list, this ain't one of them.
+=item Missing command in piped open
+
+(W) You used the C<open(FH, "| command")> or C<open(FH, "command |")>
+construction, but the command was missing or blank.
+
=item Missing operator before %s?
(S) This is an educated guess made in conjunction with the message "%s
As a general rule, you'll find it's missing near the place you were last
editing.
-=item Missing semicolon on previous line?
-
-(S) This is an educated guess made in conjunction with the message "%s
-found where operator expected". Don't automatically put a semicolon on
-the previous line just because you saw this message.
-
=item Modification of a read-only value attempted
(F) You tried, directly or indirectly, to change the value of a
=item Modification of non-creatable hash value attempted, subscript "%s"
-(F) You tried to make a hash value spring into existence, and it couldn't
+(P) You tried to make a hash value spring into existence, and it couldn't
be created for some peculiar reason.
=item Module name must be constant
=item Name "%s::%s" used only once: possible typo
-(W) Typographical errors often show up as unique variable names. If you
-had a good reason for having a unique name, then just mention it
-again somehow to suppress the message (the C<use vars> pragma is
-provided for just this purpose).
+(W) Typographical errors often show up as unique variable names.
+If you had a good reason for having a unique name, then just mention
+it again somehow to suppress the message. The C<use vars> pragma is
+provided for just this purpose.
=item Negative length
=item No command into which to pipe on command line
(F) An error peculiar to VMS. Perl handles its own command line redirection,
-and found a '|' at the end of the command line, so it doesn't know whither you
+and found a '|' at the end of the command line, so it doesn't know where you
want to pipe the output from this command.
=item No DB::DB routine defined
(F) An error peculiar to VMS. Perl handles its own command line redirection,
and found a lone 'E<gt>' at the end of the command line, so it doesn't know
-whither you wanted to redirect stdout.
+where you wanted to redirect stdout.
=item No output file after E<gt> or E<gt>E<gt> on command line
(F) The argument to B<-I> must follow the B<-I> immediately with no
intervening space.
+=item No such array field
+
+(F) You tried to access an array as a hash, but the field name used is
+not defined. The hash at index 0 should map all valid field names to
+array indices for that to work.
+
+=item No such field "%s" in variable %s of type %s
+
+(F) You tried to access a field of a typed variable where the type
+does not know about the field name. The field names are looked up in
+the %FIELDS hash in the type package at compile time. The %FIELDS hash
+is usually set up with the 'fields' pragma.
+
=item No such pipe open
(P) An error peculiar to VMS. The internal routine my_pclose() tried to
(W) You specified a signal name as a subscript to %SIG that was not recognized.
Say C<kill -l> in your shell to see the valid signal names on your system.
+=item no UTC offset information; assuming local time is UTC
+
+(S) A warning peculiar to VMS. Per was unable to find the local
+timezone offset, so it's assuming that local system time is equivalent
+to UTC. If it's not, define the logical name F<SYS$TIMEZONE_DIFFERENTIAL>
+to translate to the number of seconds which need to be added to UTC to
+get local time.
+
=item Not a CODE reference
(F) Perl was trying to evaluate a reference to a code value (that is, a
(P) The internal pattern matching routines are out of their gourd.
-=item Odd number of elements in hash list
+=item Number too long
+
+(F) Perl limits the representation of decimal numbers in programs to about
+about 250 characters. You've exceeded that length. Future versions of
+Perl are likely to eliminate this arbitrary limitation. In the meantime,
+try using scientific notation (e.g. "1e6" instead of "1_000_000").
-(S) You specified an odd number of elements to a hash list, which is odd,
-because hash lists come in key/value pairs.
+=item Odd number of elements in hash assignment
+
+(S) You specified an odd number of elements to initialize a hash, which
+is odd, because hashes come in key/value pairs.
=item Offset outside string
(S) An internal warning that the grammar is screwed up.
-=item Operation `%s': no method found,%s
+=item Operation `%s': no method found, %s
(F) An attempt was made to perform an overloaded operation for which
no handler was defined. While some handlers can be autogenerated in
(F) The yacc parser wanted to grow its stack so it could continue parsing,
but realloc() wouldn't give it more memory, virtual or otherwise.
-=item Out of memory!
+=item Out of memory during request for %s
(X|F) The malloc() function returned 0, indicating there was insufficient
-remaining memory (or virtual memory) to satisfy the request.
+remaining memory (or virtual memory) to satisfy the request.
The request was judged to be small, so the possibility to trap it
depends on the way perl was compiled. By default it is not trappable.
an emergency pool after die()ing with this message. In this case the
error is trappable I<once>.
-=item Out of memory during request for %s
+=item Out of memory during "large" request for %s
(F) The malloc() function returned 0, indicating there was insufficient
remaining memory (or virtual memory) to satisfy the request. However,
the request was judged large enough (compile-time default is 64K), so
a possibility to shut down by trapping this error is granted.
+=item Out of memory during ridiculously large request
+
+(F) You can't allocate more than 2^31+"small amount" bytes. This error
+is most likely to be caused by a typo in the Perl program. e.g., C<$arr[time]>
+instead of C<$arr[$time]>.
+
=item page overflow
(W) A single call to write() produced more lines than can fit on a page.
(P) The internal do_trans() routine was called with invalid operational data.
+=item panic: frexp
+
+(P) The library function frexp() failed, making printf("%f") impossible.
+
=item panic: goto
(P) We popped the context stack to a context with the specified label,
(P) The lexer got into a bad state while processing a case modifier.
-=item Pareneses missing around "%s" list
+=item Parentheses missing around "%s" list
(W) You said something like
(F) The setuid emulator in suidperl decided you were up to no good.
-=item pid %d not a child
+=item pid %x not a child
(W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which
isn't a subprocess of the current process. While this is fine from VMS'
(W) qw() lists contain items separated by whitespace; as with literal
strings, comment characters are not ignored, but are instead treated
as literal data. (You may have used different delimiters than the
-exclamation marks parentheses shown here; braces are also frequently
-used.)
+parentheses shown here; braces are also frequently used.)
You probably wrote something like this:
- @list = qw(
+ @list = qw(
a # a comment
b # another comment
);
when you should have written this:
@list = qw(
- a
- b
+ a
+ b
);
If you really want comments, build your list the
=item Possible attempt to separate words with commas
(W) qw() lists contain items separated by whitespace; therefore commas
-aren't needed to separate the items. (You may have used different
+aren't needed to separate the items. (You may have used different
delimiters than the parentheses shown here; braces are also frequently
used.)
-You probably wrote something like this:
+You probably wrote something like this:
qw! a, b, c !;
open(FOO || die);
-because of the strict regularization of Perl 5's grammar into unary and
-list operators. (The old open was a little of both.) You must put
-parentheses around the filehandle, or use the new "or" operator instead of "||".
+because of the strict regularization of Perl 5's grammar into unary
+and list operators. (The old open was a little of both.) You must
+put parentheses around the filehandle, or use the new "or" operator
+instead of "||".
=item print on closed filehandle %s
=item Probable precedence problem on %s
-(W) The compiler found a bare word where it expected a conditional,
+(W) The compiler found a bareword where it expected a conditional,
which often indicates that an || or && was parsed as part of the
last argument of the previous construct, for example:
open FOO || die;
-=item Prototype mismatch: (%s) vs (%s)
+=item Prototype mismatch: %s vs %s
+
+(S) The subroutine being declared or defined had previously been declared
+or defined with a different function prototype.
-(S) The subroutine being defined had a pre-declared (forward) declaration
-with a different function prototype.
+=item Range iterator outside integer range
+
+(F) One (or both) of the numeric arguments to the range operator ".."
+are outside the range which can be represented by integers internally.
+One possible workaround is to force Perl to use magical string
+increment by prepending "0" to your numbers.
=item Read on closed filehandle E<lt>%sE<gt>
=item Reallocation too large: %lx
-(F) You can't allocate more than 64K on an MSDOS machine.
+(F) You can't allocate more than 64K on an MS-DOS machine.
=item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
desired output is compiled into Perl, which entails some overhead,
which is why it's currently left out of your copy.
-=item Recursive inheritance detected
+=item Recursive inheritance detected in package '%s'
(F) More than 100 levels of inheritance were used. Probably indicates
an unintended loop in your inheritance hierarchy.
+=item Recursive inheritance detected while looking for method '%s' in package '%s'
+
+(F) More than 100 levels of inheritance were encountered while invoking a
+method. Probably indicates an unintended loop in your inheritance hierarchy.
+
+=item Reference found where even-sized list expected
+
+(W) You gave a single reference where Perl was expecting a list with
+an even number of elements (for assignment to a hash). This
+usually means that you used the anon hash constructor when you meant
+to use parens. In any case, a hash requires key/value B<pairs>.
+
+ %hash = { one => 1, two => 2, }; # WRONG
+ %hash = [ qw/ an anon array / ]; # WRONG
+ %hash = ( one => 1, two => 2, ); # right
+ %hash = qw( one 1 two 2 ); # also fine
+
=item Reference miscount in sv_replace()
(W) The internal sv_replace() function was handed a new SV with a
reference count of other than 1.
+=item regexp *+ operand could be empty
+
+(F) The part of the regexp subject to either the * or + quantifier
+could match an empty string.
+
=item regexp memory corruption
(P) The regular expression engine got confused by what the regular
(P) A "can't happen" error, because safemalloc() should have caught it earlier.
-=item regexp too big
-
-(F) The current implementation of regular expressions uses shorts as
-address offsets within a string. Unfortunately this means that if
-the regular expression compiles to longer than 32767, it'll blow up.
-Usually when you want a regular expression this big, there is a better
-way to do it with multiple statements. See L<perlre>.
-
=item Reversed %s= operator
(W) You wrote your assignment operator backwards. The = must always
=item Script is not setuid/setgid in suidperl
-(F) Oddly, the suidperl program was invoked on a script with its setuid
-or setgid bit not set. This doesn't make much sense.
+(F) Oddly, the suidperl program was invoked on a script without a setuid
+or setgid bit set. This doesn't make much sense.
=item Search pattern not terminated
(F) The lexer couldn't find the final delimiter of a // or m{}
construct. Remember that bracketing delimiters count nesting level.
+Missing the leading C<$> from a variable C<$m> may cause this error.
-=item seek() on unopened file
+=item %sseek() on unopened file
-(W) You tried to use the seek() function on a filehandle that was either
-never opened or has been closed since.
+(W) You tried to use the seek() or sysseek() function on a filehandle that
+was either never opened or has since been closed.
=item select not implemented
(W) The filehandle you're sending to got itself closed sometime before now.
Check your logic flow.
+=item Sequence (? incomplete
+
+(F) A regular expression ended with an incomplete extension (?.
+See L<perlre>.
+
=item Sequence (?#... not terminated
(F) A regular expression comment must be terminated by a closing
=item Server error
-Also known as "500 Server error". This is a CGI error, not a Perl
-error. You need to make sure your script is executable, is accessible
-by the user CGI is running the script under (which is probably not
-the user account you tested it under), does not rely on any environment
-variables (like PATH) from the user it isn't running under, and isn't
-in a location where the CGI server can't find it, basically, more or less.
+Also known as "500 Server error".
+
+B<This is a CGI error, not a Perl error>.
+
+You need to make sure your script is executable, is accessible by the user
+CGI is running the script under (which is probably not the user account you
+tested it under), does not rely on any environment variables (like PATH)
+from the user it isn't running under, and isn't in a location where the CGI
+server can't find it, basically, more or less. Please see the following
+for more information:
+
+ http://www.perl.com/perl/faq/idiots-guide.html
+ http://www.perl.com/perl/faq/perl-cgi-faq.html
+ ftp://rtfm.mit.edu/pub/usenet/news.answers/www/cgi-faq
+ http://hoohoo.ncsa.uiuc.edu/cgi/interface.html
+ http://www-genome.wi.mit.edu/WWW/faqs/www-security-faq.html
=item setegid() not implemented
=item setruid() not implemented
-(F) You tried to assign to C<$<lt>>, and your operating system doesn't support
+(F) You tried to assign to C<$E<lt>>, and your operating system doesn't support
the setruid() system call (or equivalent), or at least Configure didn't
think so.
=item Stat on unopened file E<lt>%sE<gt>
(W) You tried to use the stat() function (or an equivalent file test)
-on a filehandle that was either never opened or has been closed since.
+on a filehandle that was either never opened or has since been closed.
=item Statement unlikely to be reached
which does return. To suppress this warning, put the exec() in a block
by itself.
+=item Strange *+?{} on zero-length expression
+
+(W) You applied a regular expression quantifier in a place where it
+makes no sense, such as on a zero-width assertion.
+Try putting the quantifier inside the assertion instead. For example,
+the way to match "abc" provided that it is followed by three
+repetitions of "xyz" is C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>.
+
=item Stub found while resolving method `%s' overloading `%s' in package `%s'
(P) Overloading resolution over @ISA tree may be broken by importation stubs.
(P) The substitution was looping infinitely. (Obviously, a
substitution shouldn't iterate more times than there are characters of
-input, which is what happened.) See the discussion of substitution in
+input, which is what happened.) See the discussion of substitution in
L<perlop/"Quote and Quote-like Operators">.
=item Substitution pattern not terminated
(F) The lexer couldn't find the interior delimiter of a s/// or s{}{}
construct. Remember that bracketing delimiters count nesting level.
+Missing the leading C<$> from variable C<$s> may cause this error.
=item Substitution replacement not terminated
(F) The lexer couldn't find the final delimiter of a s/// or s{}{}
construct. Remember that bracketing delimiters count nesting level.
+Missing the leading C<$> from variable C<$s> may cause this error.
=item substr outside of string
-(W) You tried to reference a substr() that pointed outside of a string.
-That is, the absolute value of the offset was larger than the length of
-the string. See L<perlfunc/substr>.
+(S),(W) You tried to reference a substr() that pointed outside of a
+string. That is, the absolute value of the offset was larger than the
+length of the string. See L<perlfunc/substr>. This warning is
+mandatory if substr is used in an lvalue context (as the left hand side
+of an assignment or as a subroutine argument for example).
=item suidperl is no longer needed since %s
(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a
version of the setuid emulator somehow got run anyway.
+=item switching effective %s is not implemented
+
+(F) While under the C<use filetest> pragma, we cannot switch the
+real and effective uids or gids.
+
=item syntax error
(F) Probably means you had a syntax error. Common reasons include:
instead of Perl. Check the #! line, or manually feed your script
into Perl yourself.
-=item System V IPC is not implemented on this machine
+=item System V %s is not implemented on this machine
-(F) You tried to do something with a function beginning with "sem", "shm",
-or "msg". See L<perlfunc/semctl>, for example.
+(F) You tried to do something with a function beginning with "sem",
+"shm", or "msg" but that System V IPC is not implemented in your
+machine. In some machines the functionality can exist but be
+unconfigured. Consult your system support.
=item Syswrite on closed filehandle
(W) The filehandle you're writing to got itself closed sometime before now.
Check your logic flow.
+=item Target of goto is too deeply nested
+
+(F) You tried to use C<goto> to reach a label that was too deeply
+nested for Perl to reach. Perl is doing you a favor by refusing.
+
=item tell() on unopened file
(W) You tried to use the tell() function on a filehandle that was either
-never opened or has been closed since.
+never opened or has since been closed.
=item Test on unopened file E<lt>%sE<gt>
(F) There has to be at least one argument to syscall() to specify the
system call to call, silly dilly.
-=item Too late for "B<-T>" option (try putting it first)
+=item Too late for "B<-T>" option
+
+(X) The #! line (or local equivalent) in a Perl script contains the
+B<-T> option, but Perl was not invoked with B<-T> in its command line.
+This is an error because, by the time Perl discovers a B<-T> in a
+script, it's too late to properly taint everything from the environment.
+So Perl gives up.
-(X) The #! line in a Perl script contains the B<-T> option, but Perl
-was not invoked with B<-T> in its argument list. Due to the way Perl
-handles tainting, by the time Perl discovers a B<-T> in a script, it's
-too late to properly taint everything from the environment. So Perl
-gives up.
+If the Perl script is being executed as a command using the #!
+mechanism (or its local equivalent), this error can usually be fixed
+by editing the #! line so that the B<-T> option is a part of Perl's
+first argument: e.g. change C<perl -n -T> to C<perl -T -n>.
-This error can usually be fixed by editing the #! line so that the
-B<-T> option is in the Perl program's first argument. (Many operating
-systems that implement the #! feature only pick up one argument from
-it, so Perl has to get the rest on its own.)
+If the Perl script is being executed as C<perl scriptname>, then the
+B<-T> option must appear on the command line: C<perl -T scriptname>.
+
+=item Too late for "-%s" option
+
+(X) The #! line (or local equivalent) in a Perl script contains the
+B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options
+are not intended for use inside scripts. Use the C<use> pragma instead.
=item Too many ('s
(F) The regular expression ends with an unbackslashed backslash. Backslash
it. See L<perlre>.
-=item Translation pattern not terminated
+=item Transliteration pattern not terminated
(F) The lexer couldn't find the interior delimiter of a tr/// or tr[][]
-construct.
+or y/// or y[][] construct. Missing the leading C<$> from variables
+C<$tr> or C<$y> may cause this error.
-=item Translation replacement not terminated
+=item Transliteration replacement not terminated
(F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
construct.
=item umask: argument is missing initial 0
-(W) A umask of 222 is incorrect. It should be 0222, because octal literals
-always start with 0 in Perl, as in C.
+(W) A umask of 222 is incorrect. It should be 0222, because octal
+literals always start with 0 in Perl, as in C.
+
+=item umask not implemented
+
+(F) Your machine doesn't implement the umask function and you tried
+to use it to restrict permissions for yourself (EXPR & 0700).
=item Unable to create sub named "%s"
(F) The format indicated doesn't seem to exist. Perhaps it's really in
another package? See L<perlform>.
+=item Undefined value assigned to typeglob
+
+(W) An undefined value was assigned to a typeglob, a la C<*foo = undef>.
+This does nothing. It's possible that you really mean C<undef *foo>.
+
=item unexec of %s into %s failed!
(F) The unexec() routine failed for some reason. See your local FSF
=item Unquoted string "%s" may clash with future reserved word
-(W) You used a bare word that might someday be claimed as a reserved word.
+(W) You used a bareword that might someday be claimed as a reserved word.
It's best to put such a word in quotes, or capitalize it somehow, or insert
an underbar into it. You might also declare it as a subroutine.
-=item Unrecognized character \%03o ignored
+=item Unrecognized character %s
-(S) A garbage character was found in the input, and ignored, in case it's
-a weird control character on an EBCDIC machine, or some such.
+(F) The Perl parser has no idea what to do with the specified character
+in your Perl script (or eval). Perhaps you tried to run a compressed
+script, a binary program, or a directory as a Perl program.
+
+=item Unrecognized escape \\%c passed through
+
+(W) You used a backslash-character combination which is not recognized
+by Perl.
=item Unrecognized signal name "%s"
(F) You specified a signal name to the kill() function that was not recognized.
Say C<kill -l> in your shell to see the valid signal names on your system.
-=item Unrecognized switch: -%s
+=item Unrecognized switch: -%s (-h will show valid options)
(F) You specified an illegal option to Perl. Don't do that.
(If you think you didn't do that, check the #! line to see if it's
(W) A file operation was attempted on a filename, and that operation
failed, PROBABLY because the filename contained a newline, PROBABLY
-because you forgot to chop() or chomp() it off. See L<perlfunc/chop>.
+because you forgot to chop() or chomp() it off. See L<perlfunc/chomp>.
=item Unsupported directory function "%s" called
(F) Your machine doesn't support opendir() and readdir().
+=item Unsupported function fork
+
+(F) Your version of executable does not support forking.
+
+Note that under some systems, like OS/2, there may be different flavors of
+Perl executables, some of which may support fork, some not. Try changing
+the name you call Perl by to C<perl_>, C<perl__>, and so on.
+
=item Unsupported function %s
-(F) This machines doesn't implement the indicated function, apparently.
+(F) This machine doesn't implement the indicated function, apparently.
At least, Configure doesn't think so.
=item Unsupported socket function "%s" called
(F) You attempted to use a feature of printf that is accessible from
only C. This usually means there's a better way to do it in Perl.
-=item Use of %s is deprecated
-
-(D) The construct indicated is no longer recommended for use, generally
-because there's a better way to do it, and also because the old way has
-bad side effects.
-
=item Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated
(D) You are now encouraged to use the explicitly quoted form if you
-wish to use a blank line as the terminator of the here-document.
+wish to use an empty line as the terminator of the here-document.
=item Use of implicit split to @_ is deprecated
subroutine's argument list, so it's better if you assign the results of
a split() explicitly to an array (or list).
+=item Use of inherited AUTOLOAD for non-method %s() is deprecated
+
+(D) As an (ahem) accidental feature, C<AUTOLOAD> subroutines are looked
+up as methods (using the C<@ISA> hierarchy) even when the subroutines to
+be autoloaded were called as plain functions (e.g. C<Foo::bar()>), not
+as methods (e.g. C<Foo-E<gt>bar()> or C<$obj-E<gt>bar()>).
+
+This bug will be rectified in Perl 5.005, which will use method lookup
+only for methods' C<AUTOLOAD>s. However, there is a significant base
+of existing code that may be using the old behavior. So, as an
+interim step, Perl 5.004 issues an optional warning when non-methods
+use inherited C<AUTOLOAD>s.
+
+The simple rule is: Inheritance will not work when autoloading
+non-methods. The simple fix for old code is: In any module that used to
+depend on inheriting C<AUTOLOAD> for non-methods from a base class named
+C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during startup.
+
+In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> you
+should remove AutoLoader from @ISA and change C<use AutoLoader;> to
+C<use AutoLoader 'AUTOLOAD';>.
+
+=item Use of reserved word "%s" is deprecated
+
+(D) The indicated bareword is a reserved word. Future versions of perl
+may use it as a keyword, so you're better off either explicitly quoting
+the word in a manner appropriate for its context of use, or using a
+different name altogether. The warning can be suppressed for subroutine
+names by either adding a C<&> prefix, or using a package qualifier,
+e.g. C<&our()>, or C<Foo::our()>.
+
+=item Use of %s is deprecated
+
+(D) The construct indicated is no longer recommended for use, generally
+because there's a better way to do it, and also because the old way has
+bad side effects.
+
=item Use of uninitialized value
(W) An undefined value was used as if it were already defined. It was
interpreted as a "" or a 0, but maybe it was a mistake. To suppress this
warning assign an initial value to your variables.
+=item Useless use of "re" pragma
+
+(W) You did C<use re;> without any arguments. That isn't very useful.
+
=item Useless use of %s in void context
(W) You did something without a side effect in a context that does nothing
(W) A copy of the object returned from C<tie> (or C<tied>) was still
valid when C<untie> was called.
-=item Value of %s construct can be "0"; test with defined()
+=item Value of %s can be "0"; test with defined()
-(W) In a conditional expression, you used <HANDLE>, <*> (glob), or
-C<readdir> as a boolean value. Each of these constructs can return a
-value of "0"; that would make the conditional expression false, which
-is probably not what you intended. When using these constructs in
-conditional expressions, test their values with the C<defined> operator.
+(W) In a conditional expression, you used <HANDLE>, <*> (glob), C<each()>,
+or C<readdir()> as a boolean value. Each of these constructs can return a
+value of "0"; that would make the conditional expression false, which is
+probably not what you intended. When using these constructs in conditional
+expressions, test their values with the C<defined> operator.
-=item Variable "%s" is not exported
+=item Variable "%s" is not imported%s
(F) While "use strict" in effect, you referred to a global variable
that you apparently thought was imported from another module, because
This problem can usually be solved by making the inner subroutine
anonymous, using the C<sub {}> syntax. When inner anonymous subs that
reference variables in outer subroutines are called or referenced,
-they are automatically re-bound to the current values of such
+they are automatically rebound to the current values of such
variables.
=item Variable syntax
of Perl. Check the #! line, or manually feed your script into
Perl yourself.
+=item perl: warning: Setting locale failed.
+
+(S) The whole warning message will look something like:
+
+ perl: warning: Setting locale failed.
+ perl: warning: Please check that your locale settings:
+ LC_ALL = "En_US",
+ LANG = (unset)
+ are supported and installed on your system.
+ perl: warning: Falling back to the standard locale ("C").
+
+Exactly what were the failed locale settings varies. In the above the
+settings were that the LC_ALL was "En_US" and the LANG had no value.
+This error means that Perl detected that you and/or your system
+administrator have set up the so-called variable system but Perl could
+not use those settings. This was not dead serious, fortunately: there
+is a "default locale" called "C" that Perl can and will use, the
+script will be run. Before you really fix the problem, however, you
+will get the same error message each time you run Perl. How to really
+fix the problem can be found in L<perllocale> section B<LOCALE PROBLEMS>.
+
=item Warning: something's wrong
(W) You passed warn() an empty string (the equivalent of C<warn "">) or
=item Malformed PERLLIB_PREFIX
-(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
+(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
prefix1;prefix2
prefix1 prefix2
-with non-empty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
-a builtin library search path, prefix2 is substituted. The error may appear
-if components are not found, or are too long. See L<perlos2/"PERLLIB_PREFIX">.
+with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix
+of a builtin library search path, prefix2 is substituted. The error
+may appear if components are not found, or are too long. See
+"PERLLIB_PREFIX" in F<README.os2>.
=item PERL_SH_DIR too long
-(F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
-C<sh>-shell in. See L<perlos2/"PERL_SH_DIR">.
+(F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
+C<sh>-shell in. See "PERL_SH_DIR" in F<README.os2>.
=item Process terminated by SIG%s
(W) This is a standard message issued by OS/2 applications, while *nix
-applications die in silence. It is considered a feature of the OS/2
-port. One can easily disable this by appropriate sighandlers, see
-L<perlipc/"Signals">. See L<perlos2/"Process terminated by SIGTERM/SIGINT">.
+applications die in silence. It is considered a feature of the OS/2
+port. One can easily disable this by appropriate sighandlers, see
+L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"
+in F<README.os2>.
=back
projects / p5sagit/p5-mst-13.2.git / blobdiff