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>.
-
Trappable errors may be trapped using the eval operator. See
-L<perlfunc/eval>. In almost all cases, warnings may be selectively
-disabled or promoted to fatal errors using the C<warning> pragma.
-See L<warning>.
+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!
checksumming process loses information, and you can't go the other
way. See L<perlfunc/unpack>.
+=item Repeat count in pack overflows
+
+(F) You can't specify a repeat count so large that it overflows
+your signed integers. See L<perlfunc/pack>.
+
+=item Repeat count in unpack overflows
+
+(F) You can't specify a repeat count so large that it overflows
+your signed integers. See L<perlfunc/unpack>.
+
=item /%s/: Unrecognized escape \\%c passed through
(W) You used a backslash-character combination which is not recognized
=item Binary number > 0b11111111111111111111111111111111 non-portable
-(W) The binary number you specified is larger than 2**32-1 and therefore
-generally non-portable between systems. See L<perlport> for more on
-portability concerns.
+(W) The binary number you specified is larger than 2**32-1
+(4294967295) and therefore non-portable between systems. See
+L<perlport> for more on portability concerns.
=item bind() on closed fd
inlining. See L<perlsub/"Constant Functions"> for commentary and
workarounds.
+=item constant(%s): %%^H is not localized
+
+(F) When setting compile-time-lexicalized hash %^H one should set the
+corresponding bit of $^H as well.
+
+=item constant(%s): %s
+
+(F) Compile-time-substitutions (such as overloaded constants and
+character names) were not correctly set up.
+
=item Copy method did not return a reference
(F) The method which overloads "=" is buggy. See L<overload/Copy Constructor>.
=item Format %s redefined
-(W) You redefined a format, perhaps accidentally. To suppress this warning,
-say
+(W) You redefined a format. To suppress this warning, say
{
no warning;
=item Hexadecimal number > 0xffffffff non-portable
-(W) The hexadecimal number you specified is larger than 2**32-1 and
-therefore non-portable between systems. See L<perlport> for more on
-portability concerns.
+(W) The hexadecimal number you specified is larger than 2**32-1
+(4294967295) and therefore non-portable between systems. See
+L<perlport> for more on portability concerns.
=item Identifier too long
=item Integer overflow in %s number
-(F,X) The hexadecimal, octal or binary number you have specified
-either as a literal in your code or as a scalar is too big for your
-architecture. On a 32-bit architecture the largest literal hex, octal
-or binary number representable without overflow is 0xFFFFFFFF,
-037777777777, or 0b11111111111111111111111111111111 respectively.
-Note that Perl transparently promotes decimal literals to a floating
-point representation internally--subject to loss of precision errors
-in subsequent operations--so this limit usually doesn't apply to
-decimal literals. If the overflow is in a literal of your code, the
-error is untrappable (there is no way the code could work safely in
-your system), if the overflow happens in hex() or oct() the error is
-trappable.
+(W) The hexadecimal, octal or binary number you have specified either
+as a literal in your code or as a scalar is too big for your
+architecture, and has been converted to a floating point number. On a
+32-bit architecture the largest hexadecimal, octal or binary number
+representable without overflow is 0xFFFFFFFF, 037777777777, or
+0b11111111111111111111111111111111 respectively. Note that Perl
+transparently promotes all numbers to a floating point representation
+internally--subject to loss of precision errors in subsequent
+operations.
=item Internal inconsistency in tracking vforks
=item invalid [] range in regexp
(F) The range specified in a character class had a minimum character
-greater than the maximum character. See L<perlre>.
+greater than the maximum character, or the range didn't start/end with
+a literal character. See L<perlre>.
=item Invalid conversion in %s: "%s"
mentioned with the $ in Perl, unlike in the shells, where it can vary from
one line to the next.
+=item Missing %sbrace%s on \C{}
+
+(F) Wrong syntax of character name literal C<\C{charname}> within
+double-quotish context.
+
=item Missing comma after first argument to %s function
(F) While certain functions allow you to specify a filehandle or an
=item Octal number > 037777777777 non-portable
-(W) The octal number you specified is larger than 2**32-1 and
-therefore non-portable between systems. See L<perlport> for more on
-portability concerns.
+(W) The octal number you specified is larger than 2**32-1 (4294967295)
+and therefore non-portable between systems. See L<perlport> for more
+on portability concerns.
+
+See also L<perlport> for writing portable code.
=item Odd number of elements in hash assignment
(F) A sort comparison subroutine may not return a list value with more
or less than one element. See L<perlfunc/sort>.
+=item split /^/ better written as split /^/m
+
+(W) Implicit translation of /^/ to mean /^/m in split is deprecated.
+
=item Split loop
(P) The split was looping infinitely. (Obviously, a split shouldn't iterate
=item Subroutine %s redefined
-(W) You redefined a subroutine, perhaps accidentally. To suppress this
-warning, say
+(W) You redefined a subroutine. To suppress this warning, say
{
no warning;
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