to be an object method (see L<perlsub/"Subroutine Attributes"> or
L<attributes>).
-=item Ambiguous overloaded argument to %s resolved as %s
-
-(W ambiguous) You called C<keys>, C<values> or C<each> on an object that had
-overloading of C<%{}> or C<@{}> or both. In such a case, the object is
-dereferenced according to its overloading, not its underlying reference type.
-The warning is issued when C<%{}> overloading exists on a blessed arrayref,
-when C<@{}> overloading exists on a blessed hashref, or when both overloadings
-are defined (in which case C<%{}> is used). You can force the interpretation
-of the object by explicitly dereferencing it as an array or hash instead of
-passing the object itself to C<keys>, C<values> or C<each>.
-
=item Ambiguous range in transliteration operator
(F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at
(W ambiguous) You wrote something like C<@{foo}>, which might be
asking for the variable C<@foo>, or it might be calling a function
named foo, and dereferencing it as an array reference. If you wanted
-the varable, you can just write C<@foo>. If you wanted to call the
+the variable, you can just write C<@foo>. If you wanted to call the
function, write C<@{foo()}> ... or you could just not have a variable
and a function with the same name, and save yourself a lot of trouble.
the string, just write C<"-foo">. If you meant the function call,
write C<-foo()>.
+=item Ambiguous use of 's//le...' resolved as 's// le...'; Rewrite as 's//el' if you meant 'use locale rules and evaluate rhs as an expression'. In Perl 5.16, it will be resolved the other way
+
+(W deprecated, ambiguous) You wrote a pattern match with substitution
+immediately followed by "le". In Perl 5.14 and earlier, this is
+resolved as meaning to take the result of the substitution, and see if
+it is stringwise less-than-or-equal-to what follows in the expression.
+Having the "le" immediately following a pattern is deprecated behavior,
+so in Perl 5.16, this expression will be resolved as meaning to do the
+pattern match using the rules of the current locale, and evaluate the
+rhs as an expression when doing the substitution. In 5.14, if you want
+the latter interpretation, you can simply write "el" instead.
+
=item '|' and '<' may not both be specified on command line
(F) An error peculiar to VMS. Perl does its own command line
(P) A general assertion failed. The file in question must be examined.
+=item Assigning non-zero to $[ is no longer possible
+
+(F) The special variable C<$[>, deprecated in older perls, is now a fixed
+zero value, because the feature that it used to control has been removed.
+
=item Assignment to both a list and a scalar
(F) If you assign to a conditional operator, the 2nd and 3rd arguments
(P) An internal request asked to add a dirhandle entry to something
that wasn't a symbol table entry.
-
=item Bad symbol for filehandle
(P) An internal request asked to add a filehandle entry to something
print q(The character '(' starts a side comment.);
-If you're getting this error from a here-document, you may have included
-unseen whitespace before or after your closing tag. A good programmer's
-editor will have a way to help you find these characters.
+If you're getting this error from a here-document, you may have
+included unseen whitespace before or after your closing tag or there
+may not be a linebreak after it. A good programmer's editor will have
+a way to help you find these characters (or lack of characters). See
+L<perlop> for the full details on here-documents.
=item Can't find Unicode property definition "%s"
forgot to load the corresponding C<charnames> pragma?
See L<charnames>.
-
=item Constant is not %s reference
(F) A constant value (perhaps declared using the C<use constant> pragma)
(F) The method which overloads "=" is buggy. See
L<overload/Copy Constructor>.
+=item &CORE::%s cannot be called directly
+
+(F) You tried to call a subroutine in the C<CORE::> namespace
+with C<&foo> syntax or through a reference. Most subroutines
+in this package cannot yet be called that way, but must be
+called as barewords. Something like this will work:
+
+ BEGIN { *shove = \&CORE::push; }
+ shove @array, 1,2,3; # pushes on to @array
+
=item CORE::%s is not a keyword
(F) The CORE:: namespace is reserved for Perl keywords.
=item defined(%hash) is deprecated
-(D deprecated) defined() is not usually useful on hashes because it
-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.
+(D deprecated) C<defined()> is not usually right on hashes and has been
+discouraged since 5.004.
+
+Although C<defined %hash> is false on a plain not-yet-used hash, it
+becomes true in several non-obvious circumstances, including iterators,
+weak references, stash names, even remaining true after C<undef %hash>.
+These things make C<defined %hash> fairly useless in practice.
+
+If a check for non-empty is what you wanted then just put it in boolean
+context (see L<perldata/Scalar values>):
+
+ if (%hash) {
+ # not empty
+ }
+
+If you had C<defined %Foo::Bar::QUUX> to check whether such a package
+variable exists then that's never really been reliable, and isn't
+a good way to enquire about the features of a package, or whether
+it's loaded, etc.
+
=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in m/%s/
(W overflow) You called C<gmtime> with a number that was larger than
it can reliably handle and C<gmtime> probably returned the wrong
-date. This warning is also triggered with nan (the special
+date. This warning is also triggered with NaN (the special
not-a-number value).
=item gmtime(%f) too small
(W overflow) You called C<gmtime> with a number that was smaller than
it can reliably handle and C<gmtime> probably returned the wrong
-date. This warning is also triggered with nan (the special
+date. This warning is also triggered with NaN (the special
not-a-number value).
=item Got an error from DosAllocMem
(D syntax)
You had a word that isn't a regex modifier immediately following a
-pattern without an intervening space or you used one of the regex
-modifiers ("a", "d", "l", and "u") that in 5.14 are disallowed as
-suffixes. In that case, use the infix form, like C</(?a:...)/>. In the
-other case, add white space between the pattern and following word.
-As an example of the latter, the two constructs:
+pattern without an intervening space. If you are trying to use the C</le>
+flags on a substitution, use C</el> instead. Otherwise, add white space
+between the pattern and following word to eliminate the warning. As an
+example of the latter, the two constructs:
$a =~ m/$foo/sand $bar
$a =~ m/$foo/s and $bar
binary number. Interpretation of the binary number stopped before the
offending digit.
+=item Illegal character after '_' in prototype for %s : %s
+
+(W illegalproto) An illegal character was found in a prototype declaration.
+Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
+
=item Illegal character \%o (carriage return)
(F) Perl normally treats carriage returns in the program text as it
supplied (or potentially supplied) by the user. The script must set
the path to a known value, using trustworthy data. See L<perlsec>.
+=item Insecure user-defined property %s
+
+(F) Perl detected tainted data when trying to compile a regular
+expression that contains a call to a user-defined character property
+function, i.e. C<\p{IsFoo}> or C<\p{InFoo}>.
+See L<perlunicode/User-Defined Character Properties> and L<perlsec>.
+
=item Integer overflow in format string for %s
(F) The indexes and widths specified in the format string of C<printf()>
(W overflow) You called C<localtime> with a number that was larger
than it can reliably handle and C<localtime> probably returned the
-wrong date. This warning is also triggered with nan (the special
+wrong date. This warning is also triggered with NaN (the special
not-a-number value).
=item localtime(%f) too small
(W overflow) You called C<localtime> with a number that was smaller
than it can reliably handle and C<localtime> probably returned the
-wrong date. This warning is also triggered with nan (the special
+wrong date. This warning is also triggered with NaN (the special
not-a-number value).
=item Lookbehind longer than %d not implemented in regex m/%s/
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
+=item lvalue attribute cannot be removed after the subroutine has been defined
-(W misc) Making a subroutine an lvalue subroutine after it has been defined
-by declaring the subroutine with an lvalue attribute is not
-possible. To make the subroutine an lvalue subroutine add the
-lvalue attribute to the definition, or put the declaration before
-the definition.
+(W misc) The lvalue attribute on a Perl subroutine cannot be turned off
+once the subroutine is defined.
-=item Lvalue subs returning %s not implemented yet
+=item lvalue attribute ignored after the subroutine has been defined
-(F) Due to limitations in the current implementation, array and hash
-values cannot be returned in subroutines used in lvalue context. See
-L<perlsub/"Lvalue subroutines">.
+(W misc) Making a Perl subroutine an lvalue subroutine after it has been
+defined, whether by declaring the subroutine with an lvalue attribute
+or by using L<attributes.pm|attributes>, is not possible. To make the subroutine an
+lvalue subroutine, add the lvalue attribute to the definition, or put
+the declaration before the definition.
=item Malformed integer in [] in pack
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 an unblessed ARRAY reference
+
+(F) You passed a reference to a blessed array to C<push>, C<shift> or
+another array function. These only accept unblessed array references
+or arrays beginning explicitly with C<@>.
+
=item Not a SCALAR reference
(F) Perl was trying to evaluate a reference to a scalar value, but found
(P) Failed an internal consistency check while trying to reset a weak
reference.
-=item panic: Devel::DProf inconsistent subroutine return
-
-(P) Devel::DProf called a subroutine that exited using goto(LABEL),
-last(LABEL) or next(LABEL). Leaving that way a subroutine called from
-an XSUB will lead very probably to a crash of the interpreter. This is
-a bug that will hopefully one day get fixed.
-
=item panic: die %s
(P) We popped the context stack to an eval context, and then discovered
likely the glob contains an object with a reference back to the glob and a
destructor that adds a new object to the glob.
-=item panic: hfreeentries failed to free hash
-
-(P) The internal routine used to clear a hash's entries tried repeatedly,
-but each time something added more entries to the hash. Most likely the hash
-contains an object with a reference back to the hash and a destructor that
-adds a new object to the hash.
-
=item panic: INTERPCASEMOD
(P) The lexer got into a bad state at a case modifier.
(P) The sv_insert() routine was told to remove more string than there
was string.
+=item panic: strxfrm() gets absurd - a => %u, ab => %u
+
+(P) The interpreter's sanity check of the C function strxfrm() failed.
+In your current locale the returned transformation of the string "ab" is
+shorter than that of the string "a", which makes no sense.
+
=item panic: top_env
(P) The compiler attempted to do a goto, or something weird like that.
"Can't locate object method \"%s\" via package \"%s\"". It often means
that a method requires a package that has not been loaded.
+=item Perl folding rules are not up-to-date for 0x%x; please use the perlbug utility to report
+
+(W regex, deprecated) You used a regular expression with
+case-insensitive matching, and there is a bug in Perl in which the
+built-in regular expression folding rules are not accurate. This may
+lead to incorrect results. Please report this as a bug using the
+"perlbug" utility. (This message is marked deprecated, so that it by
+default will be turned-on.)
+
=item Perl_my_%s() not available
(F) Your platform has very uncommon byte-order and integer size,
(P) The regular expression engine got confused by what the regular
expression compiler gave it.
+=item Regexp modifier "/%c" may appear a maximum of twice
+
+=item Regexp modifier "/%c" may not appear twice
+
+(F syntax, regexp) The regular expression pattern had too many occurrences
+of the specified modifier. Remove the extraneous ones.
+
+=item Regexp modifier "%c" may not appear after the "-"
+
+(F regexp) Turning off the given modifier has the side effect of turning
+on another one. Perl currently doesn't allow this. Reword the regular
+expression to use the modifier you want to turn on (and place it before
+the minus), instead of the one you want to turn off.
+
+=item Regexp modifiers "/%c" and "/%c" are mutually exclusive
+
+(F syntax, regexp) The regular expression pattern had more than one of these
+mutually exclusive modifiers. Retain only the modifier that is
+supposed to be there.
+
=item Regexp out of space
(P) A "can't happen" error, because safemalloc() should have caught it
<-- HERE shows in the regular expression about where the problem was
discovered. This happens when using the C<(?^...)> construct to tell
Perl to use the default regular expression modifiers, and you
-redundantly specify a default modifier; or having a modifier that can't
-be turned off (such as C<"p"> or C<"l">) after a minus; or specifying
-more than one of the C<"d">, C<"l">, or C<"u"> modifiers. For other
+redundantly specify a default modifier. For other
causes, see L<perlre>.
=item Sequence \%s... not terminated in regex; marked by <-- HERE in m/%s/
Occasionally the line number may be misleading, and once in a blue moon
the only way to figure out what's triggering the error is to call
C<perl -c> repeatedly, chopping away half the program each time to see
-if the error went away. Sort of the cybernetic version of S<20
-questions>.
+if the error went away. Sort of the cybernetic version of S<20 questions>.
=item syntax error at line %d: `%s' unexpected
(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
-as a compiler directive. You may say only one of
-
- $[ = 0;
- $[ = 1;
- ...
- local $[ = 0;
- local $[ = 1;
- ...
-
-This is to prevent the problem of one module changing the array base out
-from under another module inadvertently. See L<perlvar/$[>.
-
=item The crypt() function is unimplemented due to excessive paranoia
(F) Configure couldn't find the crypt() function on your machine,
(F) Your machine doesn't implement a file truncation mechanism that
Configure knows about.
+=item Type of arg %d to &CORE::%s must be %s
+
+(F) The subroutine in question in the CORE package requires its argument
+to be a hard reference to data of the specified type. Overloading is
+ignored, so a reference to an object that is not the specified type, but
+nonetheless has overloading to handle it, will still not be accepted.
+
=item Type of arg %d to %s must be %s (not %s)
(F) This function requires the argument in that position to be of a
%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 hashref or arrayref
+=item Type of argument to %s must be unblessed hashref or arrayref
-(F) You called C<keys>, C<values> or C<each> with an argument that was
-expected to be a reference to a hash or a reference to an array.
+(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) You called a Win32 function with incorrect arguments.
See L<Win32> for more information.
+=item Useless assignment to a temporary
+
+(W misc) You assigned to an lvalue subroutine, but what
+the subroutine returned was a temporary scalar about to
+be discarded, so the assignment had no effect.
+
=item Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/
(W regexp) You have used an internal modifier such as (?-o) that has no
(F) The "use" keyword is recognized and executed at compile time, and
returns no useful value. See L<perlmod>.
-=item Use of assignment to $[ is deprecated
-
-(D deprecated) The C<$[> variable (index of the first element in an array)
-is deprecated. See L<perlvar/"$[">.
-
=item Use of bare << to mean <<"" is deprecated
(D deprecated) You are now encouraged to use the explicitly quoted
Currently all but the first one are discarded when used in a regular
expression pattern bracketed character class.
-=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.
-
=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
been decided. (Simply returning the boolean opposite of the
modified string is usually not particularly useful.)
-=item User-defined case-mapping '%s' is deprecated
-
-(W deprecated) You defined a function, such as C<ToLower> that overrides
-the standard case mapping, such as C<lc()> gives. This feature is being
-deprecated due to its many issues, as documented in
-L<perlunicode/User-Defined Case Mappings (for serious hackers only)>.
-It is planned to remove this feature in Perl 5.16. A CPAN module
-providing improved functionality is being prepared.
-
=item UTF-16 surrogate U+%X
(W utf8, surrogate) You had a UTF-16 surrogate in a context where they are
=head1 SEE ALSO
-L<warnings>, L<perllexwarn>.
+L<warnings>, L<perllexwarn>, L<diagnostics>.
=cut
https://perl5.git.perl.org / perl5.git / blobdiff