encountered an invalid data type.
=item Both or neither range ends should be Unicode in regex; marked by
-<-- HERE in m/%s/
+S<<-- HERE> in m/%s/
(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
do so. Such arrays are not even supposed to be accessible to
Perl code, but are only used internally.
+=item Cannot yet reorder sv_catpvfn() arguments from va_list
+
+(F) Some XS code tried to use C<sv_catpvfn()> or a related function with a
+format string that specifies explicit indexes for some of the elements, and
+using a C-style variable-argument list (a C<va_list>). This is not currently
+supported. XS authors wanting to do this must instead construct a C array of
+C<SV*> scalars containing the arguments.
+
=item Can only compress unsigned integers in pack
(F) An argument to pack("w",...) was not an integer. The BER compressed
(F) A string of a form C<CORE::word> was given to prototype(), but there
is no builtin with the name C<word>.
-=item Can't find %s character property "%s"
-
-(F) You used C<\p{}> or C<\P{}> but the character property by that name
-could not be found. Maybe you misspelled the name of the property?
-See L<perluniprops/Properties accessible through \p{} and \P{}>
-for a complete list of available official properties.
-
=item Can't find label %s
(F) You said to goto a label that isn't mentioned anywhere that it's
=item Can't find Unicode property definition "%s"
-(F) You may have tried to use C<\p> which means a Unicode
-property (for example C<\p{Lu}> matches all uppercase
-letters). If you did mean to use a Unicode property, see
+=item Can't find Unicode property definition "%s" in regex; marked by <-- HERE in m/%s/
+
+(F) The named property which you specified via C<\p> or C<\P> is not one
+known to Perl. Perhaps you misspelled the name? See
L<perluniprops/Properties accessible through \p{} and \P{}>
-for a complete list of available properties. If you didn't
-mean to use a Unicode property, escape the C<\p>, either by
-C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, or
+for a complete list of available official
+properties. If it is a
+L<user-defined property|perlunicode/User-Defined Character Properties>
+it must have been defined by the time the regular expression is
+matched.
+
+If you didn't mean to use a Unicode property, escape the C<\p>, either
+by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, or
until C<\E>).
=item Can't fork: %s
(P) The internal routine that does assignment to a substr() was handed
a NULL.
-=item Can't modify non-lvalue subroutine call
+=item Can't modify non-lvalue subroutine call of &%s
(F) Subroutines meant to be used in lvalue context should be declared as
such. See L<perlsub/"Lvalue subroutines">.
or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not
searched.
+=item Can't redeclare "%s" in "%s"
+
+(F) A "my", "our" or "state" declaration was found within another declaration,
+such as C<my ($x, my($y), $z)> or C<our (my $x)>.
+
=item Can't "redo" outside a loop block
(F) A "redo" statement was executed to restart the current block, but
discouraged, and will generate the warning (when enabled)
L</""\c%c" is more clearly written simply as "%s"">.
+=item Character following \%c must be '{' or a single-character Unicode property name in regex; marked by <-- HERE in m/%s/
+
+(F) (In the above the C<%c> is replaced by either C<p> or C<P>.) You
+specified something that isn't a legal Unicode property name. Most
+Unicode properties are specified by C<\p{...}>. But if the name is a
+single character one, the braces may be omitted.
+
=item Character in 'C' format wrapped in pack
(W pack) You said
could be defined by a translator installed into C<$^H{charnames}>.
See L<charnames/CUSTOM ALIASES>.
-=item \C is deprecated in regex; marked by <-- HERE in m/%s/
+=item chdir() on unopened filehandle %s
-(D deprecated, regexp) The \C character class is deprecated, and will
-become a compile-time error in a future release of perl (tentatively
-v5.24). This construct allows you to match a single byte of what makes
-up a multi-byte single UTF8 character, and breaks encapsulation. It is
-currently also very buggy. If you really need to process the individual
-bytes, you probably want to convert your string to one where each
-underlying byte is stored as a character, with utf8::encode().
+(W unopened) You tried chdir() on a filehandle that was never opened.
+
+=item \C no longer supported in regex; marked by S<<-- HERE> in m/%s/
+
+(F) The \C character class used to allow a match of single byte within a
+multi-byte utf-8 character, but was removed in v5.24 as it broke
+encapsulation and its implementation was extremely buggy. If you really
+need to process the individual bytes, you probably want to convert your
+string to one where each underlying byte is stored as a character, with
+utf8::encode().
=item "\c%c" is more clearly written simply as "%s"
(F) You had a (sub-)template that ends with a '/'. There must be
another template code following the slash. See L<perlfunc/pack>.
+=item Code point 0x%X is not Unicode, and not portable
+
+(S non_unicode) You had a code point that has never been in any
+standard, so it is likely that languages other than Perl will NOT
+understand it. At one time, it was legal in some standards to have code
+points up to 0x7FFF_FFFF, but not higher, and this code point is higher.
+
+Acceptance of these code points is a Perl extension, and you should
+expect that nothing other than Perl can handle them; Perl itself on
+EBCDIC platforms before v5.24 does not handle them.
+
+Code points above 0xFFFF_FFFF require larger than a 32 bit word.
+
+Perl also makes no guarantees that the representation of these code
+points won't change at some point in the future, say when machines
+become available that have larger than a 64-bit word. At that time,
+files written by an older Perl would require conversion before being
+readable by a newer Perl.
+
=item Code point 0x%X is not Unicode, may not be portable
(S non_unicode) You had a code point above the Unicode maximum
of U+10FFFF.
-Perl allows strings to contain a superset of Unicode code points, up
-to the limit of what is storable in an unsigned integer on your system,
-but these may not be accepted by other languages/systems. At one time,
-it was legal in some standards to have code points up to 0x7FFF_FFFF,
-but not higher. Code points above 0xFFFF_FFFF require larger than a
-32 bit word.
+Perl allows strings to contain a superset of Unicode code points, but
+these may not be accepted by other languages/systems. Further, even if
+these languages/systems accept these large code points, they may have
+chosen a different representation for them than the UTF-8-like one that
+Perl has, which would mean files are not exchangeable between them and
+Perl.
+
+On EBCDIC platforms, code points above 0x3FFF_FFFF have a different
+representation in Perl v5.24 than before, so any file containing these
+that was written before that version will require conversion before
+being readable by a later Perl.
=item %s: Command not found
(F) The parser found inconsistencies either while attempting
to define an overloaded constant, or when trying to find the
character name specified in the C<\N{...}> escape. Perhaps you
-forgot to load the corresponding L<overload> pragma?.
+forgot to load the corresponding L<overload> pragma?
=item :const is experimental
most likely cause of this error is that you left out a parenthesis inside
of the C<....> part.
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
=item %s defines neither package nor VERSION--version check failed
(W unpack) You have applied the same modifier more than once after a
type in a pack template. See L<perlfunc/pack>.
-=item each on reference is experimental
-
-(S experimental::autoderef) C<each> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item elseif should be elsif
(S syntax) There is no keyword "elseif" in Perl because Larry thinks
(F) You used a pattern that nested too many EVAL calls without consuming
any text. Restructure the pattern so that text is consumed.
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
=item Excessively long <> operator
use feature "signatures";
sub foo ($left, $right) { ... }
+=item Experimental %s on scalar is now forbidden
+
+(F) An experimental feature added in Perl 5.14 allowed C<each>, C<keys>,
+C<push>, C<pop>, C<shift>, C<splice>, C<unshift>, and C<values> to be called
+with a scalar argument. This experiment is considered unsuccessful, and has
+been removed. The C<postderef> feature may meet your needs better.
+
=item Experimental "%s" subs not enabled
(F) To use lexical subs, you must first enable them:
(W overflow) The hexadecimal floating point has a smaller exponent
than the floating point supports.
-=item Hexadecimal float: internal error
+=item Hexadecimal float: internal error (%s)
(F) Something went horribly bad in hexadecimal float handling.
(X) The PERL5OPT environment variable may only be used to set the
following switches: B<-[CDIMUdmtw]>.
+=item Illegal user-defined property name
+
+(F) You specified a Unicode-like property name in a regular expression
+pattern (using C<\p{}> or C<\P{}>) that Perl knows isn't an official
+Unicode property, and was likely meant to be a user-defined property
+name, but it can't be one of those, as they must begin with either C<In>
+or C<Is>. Check the spelling. See also
+L</Can't find Unicode property definition "%s">.
+
=item Ill-formed CRTL environ value "%s"
(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
C3-consistent, and you have enabled the C3 MRO for this class. See the C3
documentation in L<mro> for more information.
-=item In EBCDIC the v-string components cannot exceed 2147483647
-
-(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
-Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
-encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
-
=item Infinite recursion in regex
(F) You used a pattern that references itself without consuming any input
if you're expecting only one subscript. When called in list context,
it also returns the key in addition to the value.
+=item Invalid number '%s' for -C option.
+
+(F) You supplied a number to the -C option that either has extra leading
+zeroes or overflows perl's unsigned integer representation.
+
+=item %s() is deprecated on :utf8 handles
+
+(W deprecated) The sysread(), recv(), syswrite() and send() operators
+are deprecated on handles that have the C<:utf8> layer, either
+explicitly, or implicitly, eg., with the C<:encoding(UTF-16LE)> layer.
+
+Both sysread() and recv() currently use only the C<:utf8> flag for the
+stream, ignoring the actual layers. Since sysread() and recv() do no
+UTF-8 validation they can end up creating invalidly encoded scalars.
+
+Similarly, syswrite() and send() use only the C<:utf8> flag, otherwise
+ignoring any layers. If the flag is set, both write the value UTF-8
+encoded, even if the layer is some different encoding, such as the
+example above.
+
+Ideally, all of these operators would completely ignore the C<:utf8>
+state, working only with bytes, but this would result in silently
+breaking existing code. To avoid this a future version of perl will
+throw an exception when any of sysread(), recv(), syswrite() or send()
+are called on handle with the C<:utf8> layer.
+
=item Insecure dependency in %s
(F) You tried to do something that the tainting mechanism didn't like.
with the B<-D> option with no flags to see the list of acceptable values.
See also L<perlrun/-Dletters>.
+=item Invalid quantifier in {,} in regex; marked by S<<-- HERE> in m/%s/
+
+(F) The pattern looks like a {min,max} quantifier, but the min or max
+could not be parsed as a valid number - either it has leading zeroes,
+or it represents too big a number to cope with. The S<<-- HERE> shows
+where in the regular expression the problem was discovered. See L<perlre>.
+
=item Invalid [] range "%s" in regex; marked by S<<-- HERE> in m/%s/
(F) The range specified in a character class had a minimum character
(F) Your machine doesn't implement the sockatmark() functionality,
neither as a system call nor an ioctl call (SIOCATMARK).
-=item "%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in m/%s/
+=item '%s' is an unknown bound type in regex; marked by S<<-- HERE> in m/%s/
+
+(F) You used C<\b{...}> or C<\B{...}> and the C<...> is not known to
+Perl. The current valid ones are given in
+L<perlrebackslash/\b{}, \b, \B{}, \B>.
+
+=item "%s" is more clearly written simply as "%s" in regex; marked by S<<-- HERE> in m/%s/
(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
(W overload) You tried to overload a constant type the overload package is
unaware of.
+=item It is deprecated to use code point 0x%s; the permissible max is 0x%s
+
+(D deprecated) You used a code point that will not be allowed in a
+future perl version, because it is too large. Unicode only allows code
+points up to 0x10FFFF, but Perl allows much larger ones. However, the
+largest possible ones break the perl interpreter in some constructs,
+including causing it to hang in a few cases. The known problem areas
+are in C<tr///>, regular expression pattern matching using quantifiers,
+and as the upper limits in loops.
+
+If your code is to run on various platforms, keep in mind that the upper
+limit depends on the platform. It is much larger on 64-bit word sizes
+than 32-bit ones.
+
=item -i used with no filenames on the command line, reading from STDIN
(S inplace) The C<-i> option was passed on the command line, indicating
(P) The regular expression parser is confused.
-=item keys on reference is experimental
-
-(S experimental::autoderef) C<keys> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item Label not found for "last %s"
(F) You named a loop to break out of, but you're not currently in a loop
=item Locale '%s' may not work well.%s
(W locale) You are using the named locale, which is a non-UTF-8 one, and
-which Perl has determined is not fully compatible with Perl. The second
-C<%s> gives a reason.
+which perl has determined is not fully compatible with what it can
+handle. The second C<%s> gives a reason.
By far the most common reason is that the locale has characters in it
that are represented by more than one byte. The only such locales that
follow some unpack specification producing a numeric value.
See L<perlfunc/pack>.
+=item %s must not be a named sequence in transliteration operator
+
+(F) Transliteration (C<tr///> and C<y///>) transliterates individual
+characters. But a named sequence by definition is more than an
+individual charater, and hence doing this operation on it doesn't make
+sense.
+
=item "my sub" not yet implemented
(F) Lexically scoped subroutines are not yet implemented. Don't try
class loses its specialness: it matches almost everything, which is
probably not what you want.
-=item \N{} in inverted character class or as a range end-point is restricted to one character in regex; marked
-by S<<-- HERE> in m/%s/
+=item \N{} in inverted character class or as a range end-point is restricted to one character in regex; marked by <-- HERE in m/%s/
(F) Named Unicode character escapes (C<\N{...}>) may return a
multi-character sequence. Even though a character class is
(F) Fully qualified variable names are not allowed in "our"
declarations, because that doesn't make much sense under existing
-semantics. Such syntax is reserved for future extensions.
+rules. Such syntax is reserved for future extensions.
=item No Perl script found in input
=item Operation "%s" returns its argument for non-Unicode code point 0x%X
-(S non_unicode) You performed an operation requiring Unicode semantics
+(S non_unicode) You performed an operation requiring Unicode rules
on a code point that is not in Unicode, so what it should do is not
defined. Perl has chosen to have it do nothing, and warn you.
=item Operation "%s" returns its argument for UTF-16 surrogate U+%X
(S surrogate) You performed an operation requiring Unicode
-semantics on a Unicode surrogate. Unicode frowns upon the use
+rules on a Unicode surrogate. Unicode frowns upon the use
of surrogates for anything but storing strings in UTF-16, but
-semantics are (reluctantly) defined for the surrogates, and
+rules are (reluctantly) defined for the surrogates, and
they are to do nothing for this operation. Because the use of
surrogates can be dangerous, Perl warns.
(F) The unpack format P must have an explicit size, not "*".
-=item pop on reference is experimental
-
-(S experimental::autoderef) C<pop> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
-=item POSIX class [:%s:] unknown in regex; marked by S<< <-- HERE in m/%s/ >>
+=item POSIX class [:%s:] unknown in regex; marked by S<<-- HERE> in m/%s/
(F) The class in the character class [: :] syntax is unknown. The S<<-- HERE>
shows whereabouts in the regular expression the problem was discovered.
literal @foo, then write it as \@foo; otherwise find out what happened
to the array you apparently lost track of.
-=item Postfix dereference is experimental
-
-(S experimental::postderef) This warning is emitted if you use
-the experimental postfix dereference syntax. Simply suppress the
-warning if you want to use the feature, but know that in doing
-so you are taking the risk of using an experimental feature which
-may change or be removed in a future Perl version:
-
- no warnings "experimental::postderef";
- use feature "postderef", "postderef_qq";
- $ref->$*;
- $aref->@*;
- $aref->@[@indices];
- ... etc ...
-
=item Precedence problem: open %s should be open(%s)
(S precedence) The old irregular construct
L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"
in L<perlos2>.
-=item Property '%s' is unknown in regex; marked by S<<-- HERE> in m/%s/
-
-(F) The named property which you specified via C<\p> or C<\P> is not one
-known to Perl. Perhaps you misspelled the name? See
-L<perluniprops/Properties accessible through \p{} and \P{}>
-for a complete list of available official
-properties. If it is a L<user-defined property|perlunicode/User-Defined Character Properties>
-it must have been defined by the time the regular expression is
-compiled.
-
=item Prototype after '%c' for %s : %s
(W illegalproto) A character follows % or @ in a prototype. This is
parentheses is useless, since it will be replaced by the prototype
from the attribute before it's ever used.
-=item push on reference is experimental
-
-(S experimental::autoderef) C<push> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
-=item Quantifier follows nothing in regex; marked by S<< <-- HERE in m/%s/ >>
+=item Quantifier follows nothing in regex; marked by S<<-- HERE> in m/%s/
(F) You started a regular expression with a quantifier. Backslash it if
you meant it literally. The S<<-- HERE> shows whereabouts in the regular
expression the problem was discovered. See L<perlre>.
-=item Quantifier in {,} bigger than %d in regex; marked by S<<-- HERE> in
-m/%s/
+=item Quantifier in {,} bigger than %d in regex; marked by S<<-- HERE> in m/%s/
(F) There is currently a limit to the size of the min and max values of
the {min,max} construct. The S<<-- HERE> shows whereabouts in the regular
by prepending "0" to your numbers.
=item Ranges of ASCII printables should be some subset of "0-9", "A-Z", or
-"a-z" in regex; marked by <-- HERE in m/%s/
+"a-z" in regex; marked by S<<-- HERE> in m/%s/
(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
must be all digits, or all uppercase letters, or all lowercase letters.
=item Ranges of digits should be from the same group in regex; marked by
-<-- HERE in m/%s/
+S<<-- HERE> in m/%s/
(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
you wanted to have the character with ordinal 7 inserted into the regular
expression, prepend zeroes to make it three digits long: C<\007>
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
=item Reference to nonexistent named group in regex; marked by S<<-- HERE>
such as C<(?'NAME'...)> or C<< (?<NAME>...) >>. Check if the name has been
spelled correctly both in the backreference and the declaration.
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
=item Reference to nonexistent or unclosed group in regex; marked by
are not at least seven sets of closed capturing parentheses in the
expression before where the C<\g{-7}> was located.
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
=item regexp memory corruption
S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
+=item Sequence (?... not terminated in regex; marked by S<<-- HERE> in
+m/%s/
+
+(F) There was no matching closing parenthesis for the '('. The
+S<<-- HERE> shows whereabouts in the regular expression the problem was
+discovered.
+
=item Sequence \%s... not terminated in regex; marked by S<<-- HERE> in
m/%s/
As of Perl 5.20.0 this is a fatal error, to allow future versions of Perl
to use non-integer refs for more interesting purposes.
-=item shift on reference is experimental
-
-(S experimental::autoderef) C<shift> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item shm%s not implemented
(F) You don't have System V shared memory IPC on your system.
(F) An ancient error message that almost nobody ever runs into anymore.
But before sort was a keyword, people sometimes used it as a filehandle.
-=item Sort subroutine didn't return single value
-
-(F) A sort comparison subroutine written in XS must return exactly one
-item. See L<perlfunc/sort>.
-
=item Source filters apply only to byte streams
(F) You tried to activate a source filter (usually by loading a
try explicitly pre-extending the array by assigning $#array = $offset.
See L<perlfunc/splice>.
-=item splice on reference is experimental
-
-(S experimental::autoderef) C<splice> with a scalar argument
-is experimental and may change or be removed in a future
-Perl version. If you want to take the risk of using this
-feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item Split loop
(P) The split was looping infinitely. (Obviously, a split shouldn't
(R&NAME) true if directly inside named capture
(DEFINE) always false; for defining named subpatterns
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered. See L<perlre>.
=item Switch (?(condition)... not terminated in regex; marked by
%NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the
{EXPR} forms as an explicit dereference. See L<perlref>.
-=item Type of argument to %s must be unblessed hashref or arrayref
-
-(F) You called C<keys>, C<values> or C<each> with a scalar argument that
-was not a reference to an unblessed hash or array.
-
=item umask not implemented
(F) Your machine doesn't implement the umask function and you tried to
Check the #! line, or manually feed your script into Perl yourself.
=item Unescaped left brace in regex is deprecated, passed through in regex;
-marked by <-- HERE in m/%s/
+marked by S<<-- HERE> in m/%s/
(D deprecated, regexp) You used a literal C<"{"> character in a regular
expression pattern. You should change to use C<"\{"> instead, because a
no indication as to how the digits are to be combined
with the characters in the Lao and Thai scripts.
-=item Unicode non-character U+%X is illegal for open interchange
+=item Unicode non-character U+%X is not recommended for open interchange
(S nonchar) Certain codepoints, such as U+FFFE and U+FFFF, are
defined by the Unicode standard to be non-characters. Those
(R&NAME) true if directly inside named capture
(DEFINE) always false; for defining named subpatterns
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered. See L<perlre>.
=item Unknown Unicode option letter '%c'
think you didn't do that, check the #! line to see if it's supplying the
bad switch on your behalf.)
-=item unshift on reference is experimental
-
-(S experimental::autoderef) C<unshift> with a scalar argument
-is experimental and may change or be removed in a future
-Perl version. If you want to take the risk of using this
-feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item Unsuccessful %s on filename containing newline
(W newline) A file operation was attempted on a filename, and that
if ($string =~ /$pattern/) { ... }
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered. See L<perlre>.
=item Useless localization of %s
if ($string =~ /$pattern/o) { ... }
-The <-- HERE shows whereabouts in the regular expression the problem was
+The S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered. See L<perlre>.
=item Useless use of attribute "const"
-(W misc) The "const" attribute has no effect except
+(W misc) The C<const> attribute has no effect except
on anonymous closure prototypes. You applied it to
a subroutine via L<attributes.pm|attributes>. This is only useful
inside an attribute handler for an anonymous subroutine.
form if you wish to use an empty line as the terminator of the
here-document.
-=item Use of chdir('') or chdir(undef) as chdir() deprecated
-
-(D deprecated) chdir() with no arguments is documented to change to
-$ENV{HOME} or $ENV{LOGDIR}. chdir(undef) and chdir('') share this
-behavior, but that has been deprecated. In future versions they
-will simply fail.
-
-Be careful to check that what you pass to chdir() is defined and not
-blank, else you might find yourself in your home directory.
-
=item Use of /c modifier is meaningless in s///
(W regexp) You used the /c modifier in a substitution. The /c
If you need an empty attribute list, for example in a code generator, add
a space before the C<=>.
+=item Use of %s for non-UTF-8 locale is wrong. Assuming a UTF-8 locale
+
+(W locale) You are matching a regular expression using locale rules,
+and the specified construct was encountered. This construct is only
+valid for UTF-8 locales, which the current locale isn't. This doesn't
+make sense. Perl will continue, assuming a Unicode (UTF-8) locale, but
+the results are likely to be wrong.
+
=item Use of freed value in iteration
(F) Perhaps you modified the iterated array within the loop?
it already went past any symlink you are presumably trying to look for.
The operation returned C<undef>. Use a filename instead.
-=item Use of my $_ is experimental
-
-(S experimental::lexical_topic) Lexical $_ is an experimental feature and
-its behavior may change or even be removed in any future release of perl.
-See the explanation under L<perlvar/$_>.
-
=item Use of %s on a handle without * is deprecated
(D deprecated) You used C<tie>, C<tied> or C<untie> on a scalar but that scalar
these circumstances, Perl discards all but the first character
of the returned sequence, which is not likely what you want.
+=item Using /u for '%s' instead of /%s in regex; marked by S<<-- HERE> in m/%s/
+
+(W regexp) You used a Unicode boundary (C<\b{...}> or C<\B{...}>) in a
+portion of a regular expression where the character set modifiers C</a>
+or C</aa> are in effect. These two modifiers indicate an ASCII
+interpretation, and this doesn't make sense for a Unicode defintion.
+The generated regular expression will compile so that the boundary uses
+all of Unicode. No other portion of the regular expression is affected.
+
=item Using !~ with %s doesn't make sense
(F) Using the C<!~> operator with C<s///r>, C<tr///r> or C<y///r> is
longer than 1024 characters. The return value has been truncated to
1024 characters.
-=item values on reference is experimental
-
-(S experimental::autoderef) C<values> with a scalar argument
-is experimental and may change or be removed in a future
-Perl version. If you want to take the risk of using this
-feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item Variable "%s" is not available
(W closure) During compilation, an inner named subroutine or eval is
(W locale) While in a single-byte locale (I<i.e.>, a non-UTF-8
one), a multi-byte character was encountered. Perl considers this
-character to be the specified Unicode code point. Combining non-UTF8
+character to be the specified Unicode code point. Combining non-UTF-8
locales and Unicode is dangerous. Almost certainly some characters
will have two different representations. For example, in the ISO 8859-7
(Greek) locale, the code point 0xC3 represents a Capital Gamma. But so
with your single-byte locale (or perhaps you thought you had a UTF-8
locale, but Perl disagrees).
+=item %s() with negative argument
+
+(S misc) Certain operations make no sense with negative arguments.
+Warning is given and the operation is not done.
+
=item Within []-length '%c' not allowed
(F) The count in the (un)pack template may be replaced by C<[TEMPLATE]>
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