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
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 $x)>.
+
=item Can't "redo" outside a loop block
(F) A "redo" statement was executed to restart the current block, but
(W unpack) You have applied the same modifier more than once after a
type in a pack template. See L<perlfunc/pack>.
-=item each on reference is experimental
-
-(S experimental::autoderef) C<each> with a scalar argument is experimental
-and may change or be removed in a future Perl version. If you want to
-take the risk of using this feature, simply disable this warning:
-
- no warnings "experimental::autoderef";
-
=item elseif should be elsif
(S syntax) There is no keyword "elseif" in Perl because Larry thinks
use feature "signatures";
sub foo ($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.
if you're expecting only one subscript. When called in list context,
it also returns the key in addition to the value.
+=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.
(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
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
(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/
(F) The class in the character class [: :] syntax is unknown. The S<<-- HERE>
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/
(F) You started a regular expression with a quantifier. Backslash it if
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.
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
%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
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
=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 \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale
+=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 a Unicode boundary is being matched, but the locale is not a Unicode
-one. This doesn't make sense. Perl will continue, assuming a Unicode
-(UTF-8) locale, but the results could well be wrong except if the locale
-happens to be ISO-8859-1 (Latin1) where this message is spurious and can
-be ignored.
+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 /c modifier is meaningless in s///
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
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
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