desperation):
(W) A warning (optional).
- (D) A deprecation (optional).
+ (D) A deprecation (enabled by default).
(S) A severe warning (enabled by default).
(F) A fatal error (trappable).
(P) An internal error you should never see (trappable).
=item Attribute "unique" is deprecated
(D deprecated) You have used the attributes pragam to modify the "unique"
-attribute on a array, hash or scalar reference. The :unique attribute is has
-had no no effect since Perl 5.8.8, and will be removed in the next major
+attribute on an array, hash or scalar reference. The :unique attribute has
+had no effect since Perl 5.8.8, and will be removed in the next major
release of Perl 5.
-=item Bad arg length for %s, is %d, should be %s
+=item Bad arg length for %s, is %d, should be %d
(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
or shmctl(). In C parlance, the correct sizes are, respectively,
$var = 'myvar';
$sym = "mypack::$var";
+=item Bad plugin affecting keyword '%s'
+
+(F) An extension using the keyword plugin mechanism violated the
+plugin API.
+
=item Bad realloc() ignored
(S malloc) An internal routine called realloc() on something that had
=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
-(remember that the names of character properties consist only of
-alphanumeric characters), or maybe you forgot the C<Is> or C<In> prefix?
+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 properties.
=item Can't find label %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}> is all uppercase letters). If you did mean to use a
-Unicode property, see L<perlunicode> for the list of known properties.
+example C<\p{Lu}> matches all uppercase letters). If you did mean to use a
+Unicode property, 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, until
possible C<\E>).
situation typically indicates that the parent program under which Perl
may be running (e.g. cron) is being very careless.
+=item Can't kill a non-numeric process ID
+
+(F) Process identifiers must be (signed) integers. It is a fatal error to
+attempt to kill() an undefined, empty-string or otherwise non-numeric
+process identifier.
+
=item Can't "last" outside a loop block
(F) A "last" statement was executed to break out of the current block,
(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried
to reopen it to accept binary data. Alas, it failed.
-=item Can't resolve method `%s' overloading `%s' in package `%s'
+=item Can't resolve method "%s" overloading "%s" in package "%s"
(F|P) Error resolving overloading specified by a method name (as opposed
to a subroutine reference): no such method callable via the package. If
For example you cannot force little-endianness on a type that
is inside a big-endian group.
+=item Can't use keyword '%s' as a label
+
+(F) You attempted to use a reserved keyword, such as C<print> or C<BEGIN>,
+as a statement label. This is disallowed since Perl 5.11.0.
+
=item Can't use "my %s" in sort comparison
(F) The global variables $a and $b are reserved for sort comparisons.
infinite recursion, unless you're writing strange benchmark programs, in
which case it indicates something else.
+This threshold can be changed from 100, by recompiling the F<perl> binary,
+setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value.
+
=item defined(@array) is deprecated
(D deprecated) defined() is not usually useful on arrays because it
(F) The C<exec> function is not implemented in MacPerl. See L<perlport>.
-=item Execution of %s aborted due to compilation errors
+=item Execution of %s aborted due to compilation errors.
(F) The final summary message when a Perl compilation fails.
not finding it. Chances are you left some needed parentheses out
earlier in the line, and you really meant a "less than".
+=item gmtime(%.0f) too large
+
+(W overflow) You called C<gmtime> with an number that was beyond the 64-bit
+range that it accepts, and some rounding resulted. This warning is also
+triggered with nan (the special not-a-number value).
+
=item Got an error from DosAllocMem
(P) An error peculiar to OS/2. Most probably you're using an obsolete
supposed to follow something: a template character or a ()-group.
See L<perlfunc/pack>.
-=item %s had compilation errors
+=item %s had compilation errors.
(F) The final summary message when a C<perl -c> fails.
=item Illegal character in prototype for %s : %s
-(W syntax) An illegal character was found in a prototype declaration. Legal
-characters in prototypes are $, @, %, *, ;, [, ], &, and \.
+(W illegalproto) An illegal character was found in a prototype declaration.
+Legal characters in prototypes are $, @, %, *, ;, [, ], &, and \.
=item Illegal declaration of anonymous subroutine
(W digit) You may have tried to use an 8 or 9 in an octal number.
Interpretation of the octal number stopped before the 8 or 9.
-=item Illegal switch in PERL5OPT: %s
+=item Illegal switch in PERL5OPT: -%c
(X) The PERL5OPT environment variable may only be used to set the
following switches: B<-[CDIMUdmtw]>.
(W unopened) You tried ioctl() on a filehandle that was never opened.
Check you control flow and number of arguments.
-=item IO layers (like "%s") unavailable
+=item IO layers (like '%s') unavailable
(F) Your Perl has not been configured to have PerlIO, and therefore
you cannot use IO layers. To have PerlIO Perl must be configured
=item $* is no longer supported
-(S deprecated, syntax) The special variable C<$*>, deprecated in older perls, has
-been removed as of 5.9.0 and is no longer supported. You should use the
-C<//m> and C<//s> regexp modifiers instead.
+(D deprecated, syntax) The special variable C<$*>, deprecated in older perls, has
+been removed as of 5.9.0 and is no longer supported. In previous versions of perl the use of
+C<$*> enabled or disabled multi-line matching within a string.
+
+Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp
+modifiers. (In older versions: when C<$*> was set to a true value then all regular
+expressions behaved as if they were written using C</m>.)
=item $# is no longer supported
-(S deprecated, syntax) The special variable C<$#>, deprecated in older perls, has
+(D deprecated, syntax) The special variable C<$#>, deprecated in older perls, has
been removed as of 5.9.3 and is no longer supported. You should use the
printf/sprintf functions instead.
length/code combination tried to obtain more data. This results in
an undefined value for the length. See L<perlfunc/pack>.
+=item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input
+
+(F) An extension is attempting to insert text into the current parse
+(using L<lex_stuff_pvn_flags|perlapi/lex_stuff_pvn_flags> or similar), but
+tried to insert a character that couldn't be part of the current input.
+This is an inherent pitfall of the stuffing mechanism, and one of the
+reasons to avoid it. Where it is necessary to stuff, stuffing only
+plain ASCII is recommended.
+
+=item Lexing code internal error (%s)
+
+(F) Lexing code supplied by an extension violated the lexer's API in a
+detectable way.
+
=item listen() on closed socket %s
(W closed) 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 localtime(%.0f) too large
+
+(W overflow) You called C<localtime> with an number that was beyond the
+64-bit range that it accepts, and some rounding resulted. This warning is also triggered with nan (the special not-a-number value).
+
=item Lookbehind longer than %d not implemented in regex m/%s/
(F) There is currently a limit on the length of string which lookbehind can
by that? lstat() makes sense only on filenames. (Perl did a fstat()
instead on the filehandle.)
+=item lvalue attribute ignored after the subroutine has been defined
+
+(W) Making a subroutine an lvalue subroutine after it has been defined
+by declaring the subroutine with a lvalue attribute is not
+possible. To make the the subroutine a lvalue subroutine add the
+lvalue attribute to the definition, or put the the declaration before
+the definition.
+
=item Lvalue subs returning %s not implemented yet
(F) Due to limitations in the current implementation, array and hash
=item Malformed UTF-16 surrogate
-Perl thought it was reading UTF-16 encoded character data but while
+(F) Perl thought it was reading UTF-16 encoded character data but while
doing it Perl met a malformed Unicode surrogate.
=item Malformed UTF-8 string in pack
(F) You tried to unpack something that didn't comply with UTF-8 encoding
rules and perl was unable to guess how to make more progress.
-=item Maximal count of pending signals (%s) exceeded
+=item Maximal count of pending signals (%d) exceeded
-(F) Perl aborted due to a too important number of signals pending. This
+(F) Perl aborted due to a too high number of signals pending. This
usually indicates that your operating system tried to deliver signals
too fast (with a very high priority), starving the perl process from
resources it would need to reach a point where it can process signals
(W syntax) An underscore (underbar) in a numeric constant did not
separate two digits.
+=item Missing argument in %s
+
+(W uninitialized) A printf-type format required more arguments than were
+supplied.
+
=item Missing argument to -%c
(F) The argument to the indicated command line switch must follow
=item Missing right brace on %s
-(F) Missing right brace in C<\p{...}> or C<\P{...}>.
+(F) Missing right brace in C<\x{...}>, C<\p{...}> or C<\P{...}>.
=item Missing right curly or square bracket
you omitted the name of the module. Consult L<perlrun> for full details
about C<-M> and C<-m>.
-=item More than one argument to open
+=item More than one argument to '%s' open
(F) The C<open> function has been asked to open multiple files. This
can happen if you are trying to open a pipe to a command that takes a
the string being unpacked. The string being unpacked was also invalid
UTF-8. See L<perlfunc/pack>.
+=item Overloaded dereference did not return a reference
+
+(F) An object with an overloaded dereference operator was dereferenced,
+but the overloaded operation did not return a reference. See
+L<overload>.
+
+=item Overloaded qr did not return a REGEXP
+
+(F) An object with a C<qr> overload was used as part of a match, but the
+overloaded operation didn't return a compiled regexp. See L<overload>.
+
=item %s package attribute may clash with future reserved word: %s
(W reserved) A lowercase attribute name was used that had a
(P) Something tried to call utf16_to_utf8 with an odd (as opposed
to even) byte length.
+=item panic: utf16_to_utf8_reversed: odd bytelen
+
+(P) Something tried to call utf16_to_utf8_reversed with an odd (as opposed
+to even) byte length.
+
=item panic: yylex
(P) The lexer got into a bad state while processing a case modifier.
conversion functions. This is only a problem when you're using the
'<' or '>' modifiers in (un)pack templates. See L<perlfunc/pack>.
+=item Perl_pmflag() is deprecated, and will be removed from the XS API
+
+(D deprecated) XS code called the C function C<Perl_pmflag>. This was part of
+Perl's listed public API for extending or embedding the perl interpreter. It has
+now been removed from the public API, and will be removed in a future release,
+hence XS code should be re-written not to use it.
+
=item Perl %s required--this is only version %s, stopped
(F) The module in question uses features of a version of Perl more
=item Prototype after '%c' for %s : %s
-(W syntax) A character follows % or @ in a prototype. This is useless,
+(W illegalproto) A character follows % or @ in a prototype. This is useless,
since % and @ gobble the rest of the subroutine arguments.
=item Prototype mismatch: %s vs %s
(W io) The dirhandle you tried to do a rewinddir() on is either closed or not
really a dirhandle. Check your control flow.
-=item Runaway format
-
-(F) Your format contained the ~~ repeat-until-blank sequence, but it
-produced 200 lines at once, and the 200th line looked exactly like the
-199th line. Apparently you didn't arrange for the arguments to exhaust
-themselves, either by using ^ instead of @ (for scalar variables), or by
-shifting or popping (for array variables). See L<perlform>.
-
=item Scalars leaked: %d
(P) Something went wrong in Perl's internal bookkeeping of scalars:
(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 a numeric value
-
-(F) A sort comparison routine must return a number. You probably blew
-it by not using C<< <=> >> or C<cmp>, or by not using them correctly.
-See L<perlfunc/sort>.
-
=item Sort subroutine didn't return single value
(F) A sort comparison subroutine may not return a list value with more
(W unopened) You tried to use the stat() function on a filehandle that
was either never opened or has since been closed.
-=item Stub found while resolving method "%s" overloading "%s"
+=item Stub found while resolving method "%s" overloading "%s" in package "%s"
(P) Overloading resolution over @ISA tree may be broken by importation
stubs. Stubs should never be implicitly created, but explicit calls to
=item "-T" is on the #! line, it must also be used on the command line
(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.
+B<-T> option (or 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.
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>.
+editing the #! line so that the B<-%c> option is a part of Perl's first
+argument: e.g. change C<perl -n -%c> to C<perl -%c -n>.
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>.
+B<-%c> option must appear on the command line: C<perl -%c scriptname>.
=item To%s: illegal mapping '%s'
=item Too late for "-%s" option
(X) The #! line (or local equivalent) in a Perl script contains the
-B<-M>, B<-m> or B<-C> option. This is an error because those options
-are not intended for use inside scripts. Use the C<use> pragma instead.
+B<-M>, B<-m> or B<-C> option.
+
+In the case of B<-M> and B<-m>, this is an error because those options are
+not intended for use inside scripts. Use the C<use> pragma instead.
+
+The B<-C> option only works if it is specified on the command line as well
+(with the same sequence of letters or numbers following). Either specify
+this option on the command line, or, if your system supports it, make your
+script executable and run it directly instead of passing it to perl.
=item Too late to run %s block
(F) The unexec() routine failed for some reason. See your local FSF
representative, who probably put it there in the first place.
-=item Unicode character %s is illegal
+=item Unicode non-character %s is illegal for interchange
-(W utf8) Certain Unicode characters have been designated off-limits by
-the Unicode standard and should not be generated. If you really know
-what you are doing you can turn off this warning by C<no warnings 'utf8';>.
+(W utf8) Certain codepoints, such as U+FFFE and U+FFFF, are defined by the
+Unicode standard to be non-characters. Those are legal codepoints, but are
+reserved for internal use; so, applications shouldn't attempt to exchange
+them. In some cases, this message is also given if you use a codepoint that
+isn't in Unicode--that is it is above the legal maximum of U+10FFFF. These
+aren't legal at all in Unicode, so they are illegal for interchange, but can be
+used internally in a Perl program. If you know what you are doing you can turn
+off this warning by C<no warnings 'utf8';>.
=item Unknown BYTEORDER
=item Use of bare << to mean <<"" is deprecated
-(D deprecated, W syntax) You are now encouraged to use the explicitly quoted
+(D deprecated) You are now encouraged to use the explicitly quoted
form if you wish to use an empty line as the terminator of the here-document.
=item Use of comma-less variable list is deprecated
-(D deprecated, W syntax) The values you give to a format should be
+(D deprecated) The values you give to a format should be
separated by commas, not just aligned on a line.
=item Use of chdir('') or chdir(undef) as chdir() deprecated
operator. Since C<split> always tries to match the pattern
repeatedly, the C</g> has no effect.
-=item Use of implicit split to @_ is deprecated
+=item Use of "goto" to jump into a construct is deprecated
-(D deprecated, W syntax) It makes a lot of work for the compiler when you
-clobber a subroutine's argument list, so it's better if you assign the results
-of a split() explicitly to an array (or list).
+(D deprecated) Using C<goto> to jump from an outer scope into an inner
+scope is deprecated and should be avoided.
=item Use of inherited AUTOLOAD for non-method %s() is deprecated
0xDFFF (inclusive). That range is reserved exclusively for the use of
UTF-16 encoding (by having two 16-bit UCS-2 characters); but Perl
encodes its characters in UTF-8, so what you got is a very illegal
-character. If you really know what you are doing you can turn off
+character. If you really really know what you are doing you can turn off
this warning by C<no warnings 'utf8';>.
=item Value of %s can be "0"; test with defined()
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