you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for
alternatives.
-=item Args must match #! line
-
-(F) The setuid emulator requires that the arguments Perl was invoked
-with match the arguments specified on the #! line. Since some systems
-impose a one-argument limit on the #! line, try combining switches;
-for example, turn C<-w -U> into C<-wU>.
-
=item Arg too short for msgsnd
(F) msgsnd() requires a string at least as long as sizeof(long).
checks for an undefined I<scalar> value. If you want to see if the hash
is empty, just use C<if (%hash) { # not empty }> for example.
+=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in m/%s/
+
+(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
+most likely cause of this error is that you left out a parenthesis inside
+of the C<....> part.
+
+The <-- HERE shows in the regular expression about where the problem was
+discovered.
+
=item %s defines neither package nor VERSION--version check failed
(F) You said something like "use Module 42" but in the Module file
module) didn't define a C<DB::sub> routine to be called at the beginning
of each ordinary subroutine call.
-=item No B<-e> allowed in setuid scripts
-
-(F) A setuid script can't be specified by the user.
-
=item No error file after 2> or 2>> on command line
(F) An error peculiar to VMS. Perl handles its own command line
redirection, and found a '<' on the command line, but can't find the
name of the file from which to read data for stdin.
-=item No #! line
-
-(F) The setuid emulator requires that scripts have a well-formed #! line
-even on machines that don't support the #! construct.
-
=item No next::method '%s' found for %s
(F) C<next::method> found no further instances of this method name
a reference to something else instead. You can use the ref() function
to find out what kind of ref it really was. See L<perlref>.
-=item Not a perl script
-
-(F) The setuid emulator requires that scripts have a well-formed #! line
-even on machines that don't support the #! construct. The line must
-mention perl.
-
=item Not a SCALAR reference
(F) Perl was trying to evaluate a reference to a scalar value, but found
The <-- HERE shows in the regular expression about where the problem was
discovered.
-=item Reference to nonexistent or unclosed group in regex; marked by <-- HERE in m/%s/
-
-(F) You used something like C<\g{-7}> in your regular expression, but there
-are not at least seven sets of closed capturing parentheses in the
-expression before where the C<\g{-7}> was located.
-
-The <-- HERE shows in the regular expression about where the problem was
-discovered.
-
=item Reference to nonexistent named group in regex; marked by <-- HERE in m/%s/
(F) You used something like C<\k'NAME'> or C<< \k<NAME> >> in your regular
-expression, but there is no corresponding named capturing parentheses such
-as C<(?'NAME'...)> or C<(?<NAME>...). Check if the name has been spelled
-correctly both in the backreference and the declaration.
+expression, but there is no corresponding named capturing parentheses
+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 in the regular expression about where the problem was
discovered.
-=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in m/%s/
+=item Reference to nonexistent or unclosed group in regex; marked by <-- HERE in m/%s/
-(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
-most likely cause of this error is that you left out a parenthesis inside
-of the C<....> part.
+(F) You used something like C<\g{-7}> in your regular expression, but there
+are not at least seven sets of closed capturing parentheses in the
+expression before where the C<\g{-7}> was located.
The <-- HERE shows in the regular expression about where the problem was
discovered.
=item Reversed %s= operator
(W syntax) You wrote your assignment operator backwards. The = must
-always comes last, to avoid ambiguity with subsequent unary operators.
+always come last, to avoid ambiguity with subsequent unary operators.
=item rewinddir() attempted on invalid dirhandle %s
parsed. One way to disambiguate the parsing is to put parentheses around
the conditional expression, i.e. C<(foo) ? 0 : 1>.
-=item %sseek() on unopened filehandle
-
-(W unopened) You tried to use the seek() or sysseek() function on a
-filehandle that was either never opened or has since been closed.
-
=item seekdir() attempted on invalid dirhandle %s
(W io) The dirhandle you are doing a seekdir() on is either closed or not
really a dirhandle. Check your control flow.
+=item %sseek() on unopened filehandle
+
+(W unopened) You tried to use the seek() or sysseek() function on a
+filehandle that was either never opened or has since been closed.
+
=item select not implemented
(F) This machine doesn't implement the select() system call.
=item Sequence (?{...}) not terminated or not {}-balanced in regex; marked by <-- HERE in m/%s/
-(F) If the contents of a (?{...}) clause contains braces, they must balance
-for Perl to properly detect the end of the clause. The <-- HERE shows in
+(F) If the contents of a (?{...}) clause contain braces, they must balance
+for Perl to detect the end of the clause properly. The <-- HERE shows in
the regular expression about where the problem was discovered. See
L<perlre>.
-=item "500 Server error"
+=item Z<>500 Server error
See Server error.
forget to check the return value of your socket() call? See
L<perlfunc/setsockopt>.
-=item Setuid/gid script is writable by world
-
-(F) The setuid emulator won't run a script that is writable by the
-world, because the world might have written on it already.
-
-=item Setuid script not plain file
-
-(F) The setuid emulator won't run a script that isn't read from a file,
-but from a socket, a pipe or another device.
-
=item shm%s not implemented
(F) You don't have System V shared memory IPC on your system.
=item sv_upgrade from type %d down to type %d
-(P) Perl tried to force the upgrade an SV to a type which was actually
+(P) Perl tried to force the upgrade of an SV to a type which was actually
inferior to its current type.
=item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/
=item Switch condition not recognized in regex; marked by <-- HERE in m/%s/
-(F) If the argument to the (?(...)if-clause|else-clause) construct is a
-number, it can be only a number. The <-- HERE shows in the regular expression
-about where the problem was discovered. See L<perlre>.
+(F) If the argument to the (?(...)if-clause|else-clause) construct is
+a number, it can be only a number. The <-- HERE shows in the regular
+
expression about where the problem was discovered. See L<perlre>.
=item switching effective %s is not implemented
(F) While under the C<use filetest> pragma, we cannot switch the real
and effective uids or gids.
-=item %s syntax
+=item %s syntax OK
(F) The final summary message when a C<perl -c> succeeds.
(F) You tried to use C<goto> to reach a label that was too deeply nested
for Perl to reach. Perl is doing you a favor by refusing.
-=item tell() on unopened filehandle
-
-(W unopened) You tried to use the tell() function on a filehandle that
-was either never opened or has since been closed.
-
=item telldir() attempted on invalid dirhandle %s
(W io) The dirhandle you tried to telldir() is either closed or not really
a dirhandle. Check your control flow.
+=item tell() on unopened filehandle
+
+(W unopened) You tried to use the tell() function on a filehandle that
+was either never opened or has since been closed.
+
=item That use of $[ is unsupported
(F) Assignment to C<$[> is now strictly circumscribed, and interpreted
them. If you know what you are doing you can turn
off this warning by C<no warnings 'utf8';>.
+=item Unicode surrogate U+%X is illegal in UTF-8
+
+(W utf8) You had a UTF-16 surrogate in a context where they are
+not considered acceptable. These code points, between U+D800 and
+U+DFFF (inclusive), are used by Unicode only for UTF-16. However, Perl
+internally allows all unsigned integer code points (up to the size limit
+available on your platform), including surrogates. But these can cause
+problems when being input or output, which is likely where this message
+came from. If you really really know what you are doing you can turn
+off this warning by C<no warnings 'utf8';>.
+
=item Unknown BYTEORDER
(F) There are no byte-swapping functions for a machine with this byte
=item Unknown switch condition (?(%s in regex; marked by <-- HERE in m/%s/
(F) The condition part of a (?(condition)if-clause|else-clause) construct
-is not known. The condition may be lookahead or lookbehind (the condition
-is true if the lookahead or lookbehind is true), a (?{...}) construct (the
-condition is true if the code evaluates to a true value), or a number (the
-condition is true if the set of capturing parentheses named by the number
-matched).
+is not known. The condition must be one of the following:
+
+ (1) (2) ... true if 1st, 2nd, etc., capture matched
+ (<NAME>) ('NAME') true if named capture matched
+ (?=...) (?<=...) true if subpattern matches
+ (?!...) (?<!...) true if subpattern fails to match
+ (?{ CODE }) true if code returns a true value
+ (R) true if evaluating inside recursion
+ (R1) (R2) ... true if directly inside capture group 1, 2, etc.
+ (R&NAME) true if directly inside named capture
+ (DEFINE) always false; for defining named subpatterns
The <-- HERE shows in the regular expression about where the problem was
discovered. See L<perlre>.
(F) You specified an unknown Unicode option. See L<perlrun> documentation
of the C<-C> switch for the list of known options.
-=item Unknown warnings category '%s'
-
-(F) An error issued by the C<warnings> pragma. You specified a warnings
-category that is unknown to perl at this point.
-
-Note that if you want to enable a warnings category registered by a module
-(e.g. C<use warnings 'File::Find'>), you must have imported this module
-
=item Unknown verb pattern '%s' in regex; marked by <-- HERE in m/%s/
(F) You either made a typo or have incorrectly put a C<*> quantifier
after an open brace in your pattern. Check the pattern and review
L<perlre> for details on legal verb patterns.
-first.
+=item Unknown warnings category '%s'
+
+(F) An error issued by the C<warnings> pragma. You specified a warnings
+category that is unknown to perl at this point.
+
+Note that if you want to enable a warnings category registered by a
+module (e.g. C<use warnings 'File::Find'>), you must have loaded this
+module first.
=item unmatched [ in regex; marked by <-- HERE in m/%s/
compressed integer format and could not be converted to an integer.
See L<perlfunc/pack>.
-=item Unterminated verb pattern in regex; marked by <-- HERE in m/%s/
-
-(F) You used a pattern of the form C<(*VERB)> but did not terminate
-the pattern with a C<)>. Fix the pattern and retry.
-
-=item Unterminated verb pattern argument in regex; marked by <-- HERE in m/%s/
-
-(F) You used a pattern of the form C<(*VERB:ARG)> but did not terminate
-the pattern with a C<)>. Fix the pattern and retry.
-
=item Unterminated \g{...} pattern in regex; marked by <-- HERE in m/%s/
(F) You missed a close brace on a \g{..} pattern (group reference) in
not finding it. Chances are you left some needed parentheses out
earlier in the line, and you really meant a "less than".
+=item Unterminated verb pattern argument in regex; marked by <-- HERE in m/%s/
+
+(F) You used a pattern of the form C<(*VERB:ARG)> but did not terminate
+the pattern with a C<)>. Fix the pattern and retry.
+
+=item Unterminated verb pattern in regex; marked by <-- HERE in m/%s/
+
+(F) You used a pattern of the form C<(*VERB)> but did not terminate
+the pattern with a C<)>. Fix the pattern and retry.
+
=item untie attempted while %d inner references still exist
(W untie) A copy of the object returned from C<tie> (or C<tied>) was
If you need an empty attribute list, for example in a code generator, add
a space before the C<=>.
-=item Use of ?PATTERN? without explicit operator is deprecated
-
-(D deprecated) You have written something like C<?\w?>, for a regular
-expression that matches only once. Starting this term directly with
-the question mark delimiter is now deprecated, so that the question mark
-will be available for use in new operators in the future. Write C<m?\w?>
-instead, explicitly using the C<m> operator: the question mark delimiter
-still invokes match-once behaviour.
-
=item Use of freed value in iteration
(F) Perhaps you modified the iterated array within the loop?
=item Use of inherited AUTOLOAD for non-method %s() is deprecated
-(D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines
-are looked up as methods (using the C<@ISA> hierarchy) even when the
-subroutines to be autoloaded were called as plain functions (e.g.
-C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<<
-$obj->bar() >>).
+(D deprecated) As an (ahem) accidental feature, C<AUTOLOAD>
+subroutines are looked up as methods (using the C<@ISA> hierarchy)
+even when the subroutines to be autoloaded were called as plain
+functions (e.g. C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or
+C<< $obj->bar() >>).
This bug will be rectified in future by using method lookup only for
methods' C<AUTOLOAD>s. However, there is a significant base of existing
generally because there's a better way to do it, and also because the
old way has bad side effects.
+=item Use of -l on filehandle %s
+
+(W io) A filehandle represents an opened file, and when you opened the file
+it already went past any symlink you are presumably trying to look for.
+The operation returned C<undef>. Use a filename instead.
+
=item Use of %s on a handle without * is deprecated
(D deprecated) You used C<tie>, C<tied> or C<untie> on a scalar but that
a typeglob, and no way to untie a scalar that has had a typeglob
assigned to it.
-=item Use of -l on filehandle %s
-
-(W io) A filehandle represents an opened file, and when you opened the file
-it already went past any symlink you are presumably trying to look for.
-The operation returned C<undef>. Use a filename instead.
-
-=item Use of "package" with no arguments is deprecated
+=item Use of ?PATTERN? without explicit operator is deprecated
-(D deprecated) You used the C<package> keyword without specifying a package
-name. So no namespace is current at all. Using this can cause many
-otherwise reasonable constructs to fail in baffling ways. C<use strict;>
-instead.
+(D deprecated) You have written something like C<?\w?>, for a regular
+expression that matches only once. Starting this term directly with
+the question mark delimiter is now deprecated, so that the question mark
+will be available for use in new operators in the future. Write C<m?\w?>
+instead, explicitly using the C<m> operator: the question mark delimiter
+still invokes match-once behaviour.
=item Use of qw(...) as parentheses is deprecated
If you really do mean it, explicitly numify your reference, like so:
C<$array[0+$ref]>. This warning is not given for overloaded objects,
-either, because you can overload the numification and stringification
+however, because you can overload the numification and stringification
operators and then you presumably know what you are doing.
=item Use of reserved word "%s" is deprecated
allow this syntax, but shouldn't have. It is now deprecated, and will be
removed in a future version.
-=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
-currently reserved for future use, as the exact behaviour has not
-been decided. (Simply returning the boolean opposite of the
-modified string is usually not particularly useful.)
-
=item Using just the first character returned by \N{} in character class
(W) A charnames handler may return a sequence of more than one character.
=item Using just the first characters returned by \N{}
-(W) A charnames handler may return a sequence of characters. There is a finite
-limit as to the number of characters that can be used, which this sequence
-exceeded. In the message, the characters in the sequence are separated by
-dots, and each is shown by its ordinal in hex. Anything to the left of the
-C<HERE> was retained; anything to the right was discarded.
+(W) A charnames handler may return a sequence of characters. There is a
+finite limit as to the number of characters that can be used, which this
+sequence exceeded. In the message, the characters in the sequence are
+separated by dots, and each is shown by its ordinal in hex. Anything to
+the left of the C<HERE> was retained; anything to the right was discarded.
-=item Unicode surrogate U+%X is illegal in UTF-8
+=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
+currently reserved for future use, as the exact behaviour has not
+been decided. (Simply returning the boolean opposite of the
+modified string is usually not particularly useful.)
=item UTF-16 surrogate U+%X
=item "%s" variable %s masks earlier declaration in same %s
-(W misc) A "my", "our" or "state" variable has been redeclared in the current
-scope or statement, effectively eliminating all access to the previous
-instance. This is almost always a typographical error. Note that the
-earlier variable will still exist until the end of the scope or until
-all closure referents to it are destroyed.
+(W misc) A "my", "our" or "state" variable has been redeclared in the
+current scope or statement, effectively eliminating all access to the
+previous instance. This is almost always a typographical error. Note
+that the earlier variable will still exist until the end of the scope
+or until all closure referents to it are destroyed.
=item Variable syntax
(F) The count in the (un)pack template may be replaced by C<[TEMPLATE]> only if
C<TEMPLATE> always matches the same amount of packed bytes that can be
-determined from the template alone. This is not possible if it contains an
+determined from the template alone. This is not possible if it contains any
of the codes @, /, U, u, w or a *-length. Redesign the template.
=item write() on closed filehandle %s
https://perl5.git.perl.org / perl5.git / blobdiff