to be an object method (see L<perlsub/"Subroutine Attributes"> or
L<attributes>).
+=item Ambiguous range in transliteration operator
+
+(F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at
+all. To include a C<-> character in a transliteration, put it either
+first or last. (In the past, C<tr/a-z-0//> was synonymous with
+C<tr/a-y//>, which was probably not what you would have expected.)
+
=item Ambiguous use of %s resolved as %s
(W ambiguous)(S) You said something that may not be interpreted the way
functioning as a class, but that package doesn't define that particular
method, nor does any of its base classes. See L<perlobj>.
+=item (perhaps you forgot to load "%s"?)
+
+(F) This is an educated guess made in conjunction with the message
+"Can't locate object method \"%s\" via package \"%s\"". It often means
+that a method requires a package that has not been loaded.
+
=item Can't locate package %s for @%s::ISA
(W syntax) The @ISA array contained the name of another package that
I<inside> character classes, the [] are part of the construct, for
example: /[012[:alpha:]345]/. Note that [= =] and [. .] are not
currently implemented; they are simply placeholders for future
-extensions.
+extensions and will cause fatal errors.
=item Character class syntax [. .] is reserved for future extensions
-(W regexp) Within regular expression character classes ([]) the syntax
+(F regexp) 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: "\[." and ".\]".
+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 regexp) Within regular expression character classes ([]) the syntax
+(F) 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: "\[=" and "=\]".
+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 [:%s:] unknown
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
+that it is simpler or backtracks less. (See L<perlfaq2> for information
on I<Mastering Regular Expressions>.)
=item connect() on closed socket %s
(F) The range specified in a character class had a minimum character
greater than the maximum character. See L<perlre>.
+=item invalid [] range "%s" in transliteration operator
+
+(F) The range specified in the tr/// or y/// operator had a minimum
+character greater than the maximum character. See L<perlop>.
+
=item Invalid separator character %s in attribute list
(F) Something other than a colon or whitespace was seen between the
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>.
+"PERLLIB_PREFIX" in L<perlos2>.
=item %s matches null string many times
Another way is to assign to a substr() that's off the end of the string.
-=item Modification of non-creatable array value attempted, subscript %d
+=item Modification of non-creatable array value attempted, %s
(F) You tried to make an array value spring into existence, and the
subscript was probably negative, even counting from end of the array
backwards.
-=item Modification of non-creatable hash value attempted, subscript "%s"
+=item Modification of non-creatable hash value attempted, %s
(P) You tried to make a hash value spring into existence, and it
couldn't be created for some peculiar reason.
(F) Only a bare module name is allowed as the first argument to a "use".
-=item Module name required with -M option
+=item Module name required with -%c option
-(F) The C<-M> option says that Perl should load some module, but you
-omitted the name of the module. Consult L<perlrun> for full details
-about C<-M>.
+(F) The C<-M> or C<-m> options say that Perl should load some module, but
+you omitted the name of the module. Consult L<perlrun> for full details
+about C<-M> and C<-m>.
=item msg%s not implemented
=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 "PERL_SH_DIR" in F<README.os2>.
+C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>.
=item perl: warning: Setting locale failed.
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>.
+in L<perlos2>.
=item Prototype mismatch: %s vs %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'
+=item Recursive inheritance detected while looking for method %s
(F) More than 100 levels of inheritance were encountered while invoking
a method. Probably indicates an unintended loop in your inheritance
"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'
+=item Stub found while resolving method `%s' overloading %s
(P) Overloading resolution over @ISA tree may be broken by importation
stubs. Stubs should never be implicitly created, but explicit calls to
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 script encoding
+
+(F) Your program file begins with a Unicode Byte Order Mark (BOM) which
+declares it to be in a Unicode encoding that Perl cannot yet read.
+
=item Unsupported socket function "%s" called
(F) Your machine doesn't support the Berkeley socket mechanism, or at
character was not found. You may need to add (or remove) a backslash
character to get your parentheses to balance. See L<attributes>.
+=item Unterminated compressed integer
+
+(F) An argument to unpack("w",...) was incompatible with the BER
+compressed integer format and could not be converted to an integer.
+See L<perlfunc/pack>.
+
=item Unterminated <> operator
(F) The lexer saw a left angle bracket in a place where it was expecting
defined. It was interpreted as a "" or a 0, but maybe it was a mistake.
To suppress this warning assign a defined value to your variables.
+To help you figure out what was undefined, perl tells you what operation
+you used the undefined value in. Note, however, that perl optimizes your
+program and the operation displayed in the warning may not necessarily
+appear literally in your program. For example, C<"that $foo"> is
+usually optimized into C<"that " . $foo>, and the warning will refer to
+the C<concatenation (.)> operator, even though there is no C<.> in your
+program.
+
=item Value of %s can be "0"; test with defined()
(W misc) In a conditional expression, you used <HANDLE>, <*> (glob),
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