(X) You can't allocate more than 64K on an MS-DOS machine.
-=item '!' allowed only after types %s
+=item '%c' allowed only after types %s
-(F) The '!' is allowed in pack() or unpack() only after certain types.
-See L<perlfunc/pack>.
+(F) The modifiers '!', '<' and '>' are allowed in pack() or unpack() only
+
after certain types. See L<perlfunc/pack>.
=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
=item A thread exited while %d threads were running
-(W) When using threaded Perl, a thread (not necessarily the main
+(W threads)(S) When using threaded Perl, a thread (not necessarily the main
thread) exited while there were still other threads running.
Usually it's a good idea to first collect the return values of the
created threads by joining them, and only then exit from the main
literals or global values as arguments to the "p" pack() template to
avoid this warning.
+=item Attempt to set length of freed array
+
+(W) You tried to set the length of an array which has been freed. You
+can do this by storing a reference to the scalar representing the last index
+of an array and later assigning through that reference. For example
+
+ $r = do {my @a; \$#a};
+ $$r = 503
+
=item Attempt to use reference as lvalue in substr
(W substr) You supplied a reference as the first argument to substr()
(P) An internal request asked to add an array entry to something that
wasn't a symbol table entry.
+=item Bad symbol for dirhandle
+
+(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
(F) An argument to pack("w",...) was negative. The BER compressed integer
format can only be used with positive integers. See L<perlfunc/pack>.
+=item Cannot convert a reference to %s to typeglob
+
+(F) You manipulated Perl's symbol table directly, stored a reference in it,
+then tried to access that symbol via conventional Perl syntax. The access
+triggers Perl to autovivify that typeglob, but it there is no legal conversion
+from that type of reference to a typeglob.
+
=item Can only compress unsigned integers in pack
(F) An argument to pack("w",...) was not an integer. The BER compressed
(F) Only hard references may be blessed. This is how Perl "enforces"
encapsulation of objects. See L<perlobj>.
+=item Can't "break" in a loop topicalizer
+
+(F) You called C<break>, but you're in a C<foreach> block rather than
+a C<given> block. You probably meant to use C<next> or C<last>.
+
+=item Can't "break" outside a given block
+
+(F) You called C<break>, but you're not inside a C<given> block.
+
=item Can't call method "%s" in empty package "%s"
(F) You called a method correctly, and it correctly indicated a package
(F) Certain types of SVs, in particular real symbol table entries
(typeglobs), can't be forced to stop being what they are.
+=item Can't "continue" outside a when block
+
+(F) You called C<continue>, but you're not inside a C<when>
+or C<default> block.
+
=item Can't create pipe mailbox
(P) An error peculiar to VMS. The process is suffering from exhausted
point. For example, it'd be kind of silly to put a B<-x> on the #!
line.
+=item Can't %s %s-endian %ss on this platform
+
+(F) Your platform's byte-order is neither big-endian nor little-endian,
+or it has a very strange pointer size. Packing and unpacking big- or
+little-endian floating point values and pointers may not be possible.
+See L<perlfunc/pack>.
+
=item Can't exec "%s": %s
(W exec) A system(), exec(), or piped open call could not execute the
found in the PATH, or at least not with the correct permissions. The
script exists in the current directory, but PATH prohibits running it.
-=item Can't find %s 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.
-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>).
-
=item Can't find string terminator %s anywhere before EOF
(F) Perl strings can stretch over multiple lines. This message means
unseen whitespace before or after your closing tag. A good programmer's
editor will have a way to help you find these characters.
+=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.
+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>).
+
=item Can't fork
(F) A fatal error occurred while trying to fork while opening a
you tried to jump out of a sort() block or subroutine, which is a no-no.
See L<perlfunc/goto>.
-=item Can't goto subroutine from an eval-string
+=item Can't goto subroutine from a sort sub (or similar callback)
+
+(F) The "goto subroutine" call can't be used to jump out of the
+comparison sub for a sort(), or from a similar callback (such
+as the reduce() function in List::Util).
+
+=item Can't goto subroutine from an eval-%s
(F) The "goto subroutine" call can't be used to jump out of an eval
-"string". (You can use it to jump out of an eval {BLOCK}, but you
-probably don't want to.)
+"string" or block.
=item Can't goto subroutine outside a subroutine
inner curlies will be considered a block that loops once. See
L<perlfunc/last>.
+=item Can't load '%s' for module %s
+
+(F) The module you tried to load failed to load a dynamic extension. This
+may either mean that you upgraded your version of perl to one that is
+incompatible with your old dynamic extensions (which is known to happen
+between major versions of perl), or (more likely) that your dynamic
+extension was built against an older version of the library that is
+installed on your system. You may need to rebuild your old dynamic
+extensions.
+
=item Can't localize lexical variable %s
(F) You used local on a variable name that was previously declared as a
are a misprint in a function/method name or a failure to C<AutoSplit>
the file, say, by doing C<make install>.
+=item Can't locate loadable object for module %s in @INC
+
+(F) The module you loaded is trying to load an external library, like
+for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was
+unable to locate this library. See L<DynaLoader>.
+
=item Can't locate object method "%s" via package "%s"
(F) You called a method correctly, and it correctly indicated a package
(F) The script you specified can't be opened for the indicated reason.
-=item Can't provide tied hash usage; use keys(%hash) to test if empty
-
-(F) When a hash is evaluated in scalar context, bucket usage is
-returned if the hash is populated, and false is returned if the hash
-is empty. Bucket usage is not currently available for tied hashes.
-To test if a hash is empty or populated, use keys(%hash) in scalar
-context instead.
+If you're debugging a script that uses #!, and normally relies on the
+shell's $PATH search, the -S option causes perl to do that search, so
+you don't have to type the path or C<`which $scriptname`>.
=item Can't read CRTL environ
or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not
searched.
-=item Can't redefine active sort subroutine %s
-
-(F) Perl optimizes the internal handling of sort subroutines and keeps
-pointers into them. You tried to redefine one such sort subroutine when
-it was currently active, which is not allowed. If you really want to do
-this, you should write C<sort { &func } @x> instead of C<sort func @x>.
-
=item Can't "redo" outside a loop block
(F) A "redo" statement was executed to restart the current block, but
Errno.pm module. The Errno module is expected to tie the %! hash to
provide symbolic names for C<$!> errno values.
+=item Can't use both '<' and '>' after type '%c' in %s
+
+(F) A type cannot be forced to have both big-endian and little-endian
+byte-order at the same time, so this combination of modifiers is not
+allowed. See L<perlfunc/pack>.
+
=item Can't use %s for loop variable
(F) Only a simple scalar variable may be used as a loop variable on a
have variables in your program that looked like magical variables but
weren't.
+=item Can't use '%c' in a group with different byte-order in %s
+
+(F) You attempted to force a different byte-order on a type
+that is already inside a group with a byte-order modifier.
+For example you cannot force little-endianness on a type that
+is inside a big-endian group.
+
=item Can't use "my %s" in sort comparison
(F) The global variables $a and $b are reserved for sort comparisons.
(F) The compiler tried to interpret a bracketed expression as a
subscript. But to the left of the brackets was an expression that
-didn't look like an array reference, or anything else subscriptable.
+didn't look like a hash or array reference, or anything else subscriptable.
=item Can't use \%c to mean $%c in expression
value that prints out looking like SCALAR(0xdecaf). Use the $1 form
instead.
+=item Can't use "when" outside a topicalizer
+
+(F) You have used a when() block that is neither inside a C<foreach>
+loop nor a C<given> block. (Note that this error is issued on exit
+from the C<when> block, so you won't get the error if the match fails,
+or if you use an explicit C<continue>.)
+
=item Can't weaken a nonreference
(F) You attempted to weaken something that was not a reference. Only
with an assignment operator, which implies modifying the value itself.
Perhaps you need to copy the value to a temporary, and repeat that.
-=item Character in "C" format wrapped in pack
+=item Character in 'C' format wrapped in pack
(W pack) You said
If you actually want to pack Unicode codepoints, use the C<"U"> format
instead.
-=item Character in "c" format wrapped in pack
+=item Character in 'W' format wrapped in pack
+
+(W pack) You said
+
+ pack("U0W", $x)
+
+where $x is either less than 0 or more than 255. However, C<U0>-mode expects
+all values to fall in the interval [0, 255], so Perl behaved as if you
+meant:
+
+ pack("U0W", $x & 255)
+
+=item Character in 'c' format wrapped in pack
(W pack) You said
If you actually want to pack Unicode codepoints, use the C<"U"> format
instead.
+=item Character in '%c' format wrapped in unpack
+
+(W unpack) You tried something like
+
+ unpack("H", "\x{2a1}")
+
+where the format expects to process a byte (a character with a value
+below 256), but a higher value was provided instead. Perl uses the value
+modulus 256 instead, as if you had provided:
+
+ unpack("H", "\x{a1}")
+
+=item Character(s) in '%c' format wrapped in pack
+
+(W pack) You tried something like
+
+ pack("u", "\x{1f3}b")
+
+where the format expects to process a sequence of bytes (character with a
+value below 256), but some of the characters had a higher value. Perl
+uses the character values modulus 256 instead, as if you had provided:
+
+ pack("u", "\x{f3}b")
+
+=item Character(s) in '%c' format wrapped in unpack
+
+(W unpack) You tried something like
+
+ unpack("s", "\x{1f3}b")
+
+where the format expects to process a sequence of bytes (character with a
+value below 256), but some of the characters had a higher value. Perl
+uses the character values modulus 256 instead, as if you had provided:
+
+ unpack("s", "\x{f3}b")
+
=item close() on unopened filehandle %s
(W unopened) You tried to close a filehandle that was never opened.
+=item closedir() attempted on invalid dirhandle %s
+
+(W io) The dirhandle you tried to close is either closed or not really
+a dirhandle. Check your control flow.
+
=item Code missing after '/'
(F) You had a (sub-)template that ends with a '/'. There must be another
long for Perl to handle. You have to be seriously twisted to write code
that triggers this error.
+=item Deprecated use of my() in false conditional
+
+(D deprecated) You used a declaration similar to C<my $x if 0>.
+There has been a long-standing bug in Perl that causes a lexical variable
+not to be cleared at scope exit when its declaration includes a false
+conditional. Some people have exploited this bug to achieve a kind of
+static variable. Since we intend to fix this bug, we don't want people
+relying on this behavior. You can achieve a similar static effect by
+declaring the variable in a separate block outside the function, eg
+
+ sub f { my $x if 0; return $x++ }
+
+becomes
+
+ { my $x; sub f { return $x++ } }
+
+=item DESTROY created new reference to dead object '%s'
+
+(F) A DESTROY() method created a new reference to the object which is
+just being DESTROYed. Perl is confused, and prefers to abort rather than
+to create a dangling reference.
+
=item Did not produce a valid header
See Server error.
=item (Do you need to predeclare %s?)
-(S) This is an educated guess made in conjunction with the message "%s
-found where operator expected". It often means a subroutine or module
+(S syntax) This is an educated guess made in conjunction with the message
+"%s found where operator expected". It often means a subroutine or module
name is being referenced that hasn't been declared yet. This may be
because of ordering problems in your file, or because of a missing
"sub", "package", "require", or "use" statement. If you're referencing
(S malloc) An internal routine called free() on something that had
already been freed.
+=item Duplicate modifier '%c' after '%c' in %s
+
+(W) You have applied the same modifier more than once after a type
+in a pack template. See L<perlfunc/pack>.
+
=item elseif should be elsif
-(S) There is no keyword "elseif" in Perl because Larry thinks it's ugly.
-Your code will be interpreted as an attempt to call a method named
+(S syntax) There is no keyword "elseif" in Perl because Larry thinks it's
+ugly. Your code will be interpreted as an attempt to call a method named
"elseif" for the class returned by the following block. This is
unlikely to be what you want.
(F) While under the C<use filetest> pragma, switching the real and
effective uids or gids failed.
+=item %ENV is aliased to %s
+
+(F) You're running under taint mode, and the C<%ENV> variable has been
+aliased to another hash, so it doesn't reflect anymore the state of the
+program's environment. This is potentially insecure.
+
=item Error converting file specification %s
(F) An error peculiar to VMS. Because Perl may have to deal with file
(F) Your machine apparently doesn't implement fcntl(). What is this, a
PDP-11 or something?
+=item Field too wide in 'u' format in pack
+
+(W pack) Each line in an uuencoded string start with a length indicator
+which can't encode values above 63. So there is no point in asking for
+a line length bigger than that. Perl will behave as if you specified
+C<u63> as format.
+
=item Filehandle %s opened only for input
(W io) You tried to write on a read-only filehandle. If you intended
=item Filehandle %s reopened as %s only for input
(W io) You opened for reading a filehandle that got the same filehandle id
-as STDOUT or STDERR. This occured because you closed STDOUT or STDERR
+as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
previously.
=item Filehandle STDIN reopened as %s only for output
(W io) You opened for writing a filehandle that got the same filehandle id
-as STDIN. This occured because you closed STDIN previously.
+as STDIN. This occurred because you closed STDIN previously.
=item Final $ should be \$ or $name
=item %s found where operator expected
-(S) The Perl lexer knows whether to expect a term or an operator. If it
-sees what it knows to be a term when it was expecting to see an
+(S syntax) The Perl lexer knows whether to expect a term or an operator.
+If it sees what it knows to be a term when it was expecting to see an
operator, it gives you this warning. Usually it indicates that an
operator or delimiter was omitted, such as a semicolon.
(F) When using the C<sub> keyword to construct an anonymous subroutine,
you must always specify a block of code. See L<perlsub>.
+=item Illegal declaration of subroutine %s
+
+(F) A subroutine was not declared correctly. See L<perlsub>.
+
=item Illegal division by zero
(F) You tried to divide a number by 0. Either something was wrong in
=item Illegal switch in PERL5OPT: %s
(X) The PERL5OPT environment variable may only be used to set the
-following switches: B<-[DIMUdmtw]>.
+following switches: B<-[CDIMUdmtwA]>.
=item Ill-formed CRTL environ value "%s"
(F) You can't use system(), exec(), or a piped open in a setuid or
setgid script if C<$ENV{PATH}> contains a directory that is writable by
-the world. See L<perlsec>.
+the world. Also, the PATH must not contain any relative directory.
+See L<perlsec>.
=item Insecure $ENV{%s} while running %s
internally--subject to loss of precision errors in subsequent
operations.
+=item Integer overflow in format string for %s
+
+(F) The indexes and widths specified in the format string of printf()
+or sprintf() are too large. The numbers must not overflow the size of
+integers for your architecture.
+
=item Integer overflow in version
(F) Some portion of a version initialization is too large for the
been removed as of 5.9.0 and is no longer supported. You should use the
C<//m> and C<//s> regexp modifiers instead.
+=item $# is no longer supported
+
+(D deprecated) The special variable C<$#>, 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.
+
=item `%s' is not a code reference
(W overload) The second (fourth, sixth, ...) argument of overload::constant
=item length/code after end of string in unpack
-(F) While unpacking, the string buffer was alread used up when an unpack
+(F) While unpacking, the string buffer was already used up when an unpack
length/code combination tried to obtain more data. This results in
an undefined value for the length. See L<perlfunc/pack>.
=item Malformed UTF-8 character (%s)
-Perl detected something that didn't comply with UTF-8 encoding rules.
+(S utf8) (F) Perl detected something that didn't comply with UTF-8
+encoding rules.
One possible cause is that you read in data that you thought to be in
UTF-8 but it wasn't (it was for example legacy 8-bit data). Another
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 pack something that didn't comply with UTF-8 encoding
+rules and perl was unable to guess how to make more progress.
+
+=item Malformed UTF-8 string in unpack
+
+(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 Malformed UTF-8 string in '%c' format in unpack
+
+(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 %s matches null string many times in regex; marked by <-- HERE in m/%s/
(W regexp) The pattern you've specified would be an infinite loop if the
(W syntax) An underscore (underbar) in a numeric constant did not
separate two digits.
+=item Missing argument to -%c
+
+(F) The argument to the indicated command line switch must follow
+immediately after the switch, without intervening spaces.
+
=item Missing %sbrace%s on \N{}
(F) Wrong syntax of character name literal C<\N{charname}> within
=item (Missing operator before %s?)
-(S) This is an educated guess made in conjunction with the message "%s
-found where operator expected". Often the missing operator is a comma.
+(S syntax) This is an educated guess made in conjunction with the message
+"%s found where operator expected". Often the missing operator is a comma.
=item Missing right brace on %s
=item (Missing semicolon on previous line?)
-(S) This is an educated guess made in conjunction with the message "%s
-found where operator expected". Don't automatically put a semicolon on
+(S syntax) This is an educated guess made in conjunction with the message
+"%s found where operator expected". Don't automatically put a semicolon on
the previous line just because you saw this message.
=item Modification of a read-only value attempted
(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
They're written like C<$foo[1][2][3]>, as in C.
-=item '/' must be followed by 'a*', 'A*' or 'Z*'
-
-(F) You had a pack template indicating a counted-length string,
-Currently the only things that can have their length counted are a*, A*
-or Z*. See L<perlfunc/pack>.
-
=item '/' must follow a numeric type in unpack
(F) You had an unpack template that contained a '/', but this did not
(S internal) The symbol in question was declared but somehow went out of
scope before it could possibly have been used.
-=item Newline in left-justified string for %s
-
-(W printf) There is a newline in a string to be left justified by
-C<printf> or C<sprintf>.
-
-The padding spaces will appear after the newline, which is probably not
-what you wanted. Usually you should remove the newline from the string
-and put formatting characters in the C<sprintf> format.
-
=item No %s allowed while running setuid
(F) Certain operations are deemed to be too insecure for a setuid or
=item No DB::DB routine defined
(F) The currently executing code was compiled with the B<-d> switch, but
-for some reason the perl5db.pl file (or some facsimile thereof) didn't
-define a routine to be called at the beginning of each statement. Which
-is odd, because the file should have been required automatically, and
-should have blown up the require if it didn't parse right.
+for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
+module) didn't define a routine to be called at the beginning of each
+statement.
=item No dbm on this machine
(P) This is counted as an internal error, because every machine should
supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
-=item No DBsub routine
+=item No DB::sub routine defined
-(F) The currently executing code was compiled with the B<-d> switch,
-but for some reason the perl5db.pl file (or some facsimile thereof)
-didn't define a DB::sub routine to be called at the beginning of each
-ordinary subroutine call.
+(F) The currently executing code was compiled with the B<-d> switch, but
+for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
+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) Configure didn't find anything resembling the setreuid() call for
your system.
-=item No space allowed after -%c
-
-(F) The argument to the indicated command line switch must follow
-immediately after the switch, without intervening spaces.
-
=item No %s specified for -%c
(F) The indicated command line switch needs a mandatory argument, but
you haven't specified one.
+=item No such class field "%s" in variable %s of type %s
+
+(F) You tried to access a key from a hash through the indicated typed variable
+but that key is not allowed by the package of the same type. The indicated
+package has restricted the set of allowed keys using the L<fields> pragma.
+
=item No such class %s
(F) You provided a class qualifier in a "my" or "our" declaration, but
F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which
need to be added to UTC to get local time.
+=item Non-string passed as bitmask
+
+(W misc) A number has been passed as a bitmask argument to select().
+Use the vec() function to construct the file descriptor bitmasks for
+select. See L<perlfunc/select>
+
=item Null filename used
(F) You can't require the null filename, especially because on many
(S internal) An internal warning that the grammar is screwed up.
-=item Operation `%s': no method found, %s
+=item Operation "%s": no method found, %s
(F) An attempt was made to perform an overloaded operation for which no
handler was defined. While some handlers can be autogenerated in terms
the current limits and change them, and in ksh/bash/zsh use C<ulimit -a>
and C<ulimit -d n>, respectively.
+=item Out of memory during %s extend
+
+(X) An attempt was made to extend an array, a list, or a string beyond
+the largest possible memory allocation.
+
=item Out of memory during "large" request for %s
(F) The malloc() function returned 0, indicating there was insufficient
parsing, but realloc() wouldn't give it more memory, virtual or
otherwise.
+=item '.' outside of string in pack
+
+(F) The argument to a '.' in your template tried to move the working
+position to before the start of the packed string being built.
+
=item '@' outside of string in unpack
(F) You had a template that specified an absolute position outside
the string being unpacked. See L<perlfunc/pack>.
+=item '@' outside of string with malformed UTF-8 in unpack
+
+(F) You had a template that specified an absolute position outside
+the string being unpacked. The string being unpacked was also invalid
+UTF-8. See L<perlfunc/pack>.
+
=item %s package attribute may clash with future reserved word: %s
(W reserved) A lowercase attribute name was used that had a
(P) An internal error.
+=item panic: attempt to call %s in %s
+
+(P) One of the file test operators entered a code branch that calls
+an ACL related-function, but that function is not available on this
+platform. Earlier checks mean that it should not be possible to
+enter this branch on this platform.
+
=item panic: ck_grep
(P) Failed an internal consistency check trying to compile a grep.
(P) We popped the context stack to a context with the specified label,
and then discovered it wasn't a context we know how to do a goto in.
+=item panic: hfreeentries failed to free hash
+
+(P) The internal routine used to clear a hashes 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) Something requested a negative number of bytes of malloc.
-=item panic: mapstart
-
-(P) The compiler is screwed up with respect to the map() function.
+=item panic: memory wrap
-=item panic: null array
-
-(P) One of the internal array routines was passed a null AV pointer.
+(P) Something tried to allocate more memory than possible.
=item panic: pad_alloc
(P) The compiler attempted to do a goto, or something weird like that.
+=item panic: unimplemented op %s (#%d) called
+
+(P) The compiler is screwed up and attempted to use an op that isn't permitted
+at run time.
+
=item panic: utf16_to_utf8: odd bytelen
(P) Something tried to call utf16_to_utf8 with an odd (as opposed
"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_my_%s() not available
+
+(F) Your platform has very uncommon byte-order and integer size,
+so it was not possible to set up some or all fixed-width byte-order
+conversion functions. This is only a problem when you're using the
+'<' or '>' modifiers in (un)pack templates. See L<perlfunc/pack>.
+
=item Perl %s required--this is only version %s, stopped
(F) The module in question uses features of a version of Perl more
literal @foo, then write it as \@foo; otherwise find out what happened
to the array you apparently lost track of.
-=item Possible Y2K bug: %s
-
-(W y2k) You are concatenating the number 19 with another number, which
-could be a potential Year 2000 problem.
-
=item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead
(D deprecated) You have written something like this:
One possible workaround is to force Perl to use magical string increment
by prepending "0" to your numbers.
+=item readdir() attempted on invalid dirhandle %s
+
+(W io) The dirhandle you're reading from is either closed or not really
+a dirhandle. Check your control flow.
+
=item readline() on closed filehandle %s
(W closed) The filehandle you're reading from got itself closed sometime
(P) A "can't happen" error, because safemalloc() should have caught it
earlier.
+=item Repeated format line will never terminate (~~ and @# incompatible)
+
+(F) Your format contains the ~~ repeat-until-blank sequence and a
+numeric field that will never go blank so that the repetition never
+terminates. You might use ^# instead. See L<perlform>.
+
=item Reversed %s= operator
(W syntax) You wrote your assignment operator backwards. The = must
always comes last, to avoid ambiguity with subsequent unary operators.
+=item rewinddir() attempted on invalid dirhandle %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
in Perl 5.9.0 or later that uses the // as the I<defined-or> can be
misparsed by pre-5.9.0 Perls as a non-terminated search pattern.
+=item Search pattern not terminated or ternary operator parsed as search pattern
+
+(F) The lexer couldn't find the final delimiter of a C<?PATTERN?>
+construct.
+
+The question mark is also used as part of the ternary operator (as in
+C<foo ? 0 : 1>) leading to some ambiguous constructions being wrongly
+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 select not implemented
(F) This machine doesn't implement the select() system call.
(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 !=~ should be !~
+
+(W syntax) The non-matching operator is !~, not !=~. !=~ will be
+interpreted as the != (numeric not equal) and ~ (1's complement)
+operators: probably not what you intended.
+
=item <> should be quotes
(F) You wrote C<< require <file> >> when you should have written
(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"
(P) Overloading resolution over @ISA tree may be broken by importation
stubs. Stubs should never be implicitly created, but explicit calls to
(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but
a version of the setuid emulator somehow got run anyway.
+=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
+inferior to its current type.
+
=item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/
(F) A (?(condition)if-clause|else-clause) construct can have at most two
(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 That use of $[ is unsupported
(F) Assignment to C<$[> is now strictly circumscribed, and interpreted
past the symlink to get to the real file. Use an actual filename
instead.
+=item The 'unique' attribute may only be applied to 'our' variables
+
+(F) Currently this attribute is not supported on C<my> or C<sub>
+declarations. See L<perlfunc/our>.
+
=item This Perl can't reset CRTL environ elements (%s)
=item This Perl can't set CRTL environ elements (%s=%s)
=item thread failed to start: %s
-(F) The entry point function of threads->create() failed for some reason.
-
-=item Tied variable freed while still in use
-
-(F) An access method for a tied variable (e.g. FETCH) did something to
-free the variable. Since continuing the current operation is likely
-to result in a coredump, Perl is bailing out instead.
+(W threads)(S) The entry point function of threads->create() failed for some reason.
=item times not implemented
(F) Your version of the C library apparently doesn't do times(). I
suspect you're not running on Unix.
+=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.
+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>.
+
+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>.
+
=item To%s: illegal mapping '%s'
(F) You tried to define a customized To-mapping for lc(), lcfirst,
=item Too late for "-%s" option
(X) The #! line (or local equivalent) in a Perl script contains the
-B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options
+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.
-=item Too late for "B<-T>" option
-
-(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.
-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>.
-
-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>.
-
=item Too late to run %s block
(W void) A CHECK or INIT block is being defined during run time proper,
=item Transliteration replacement not terminated
-(F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
-construct.
+(F) The lexer couldn't find the final delimiter of a tr///, tr[][],
+y/// or y[][] construct.
=item '%s' trapped by operation mask
of Perl executables, some of which may support fork, some not. Try
changing the name you call Perl by to C<perl_>, C<perl__>, and so on.
-=item Unsupported script encoding
+=item Unsupported script encoding %s
(F) Your program file begins with a Unicode Byte Order Mark (BOM) which
-declares it to be in a Unicode encoding that Perl cannot yet read.
+declares it to be in a Unicode encoding that Perl cannot read.
=item Unsupported socket function "%s" called
This warning will not be issued for numerical constants equal to 0 or 1
since they are often used in statements like
- 1 while sub_with_side_effects() ;
+ 1 while sub_with_side_effects();
String constants that would normally evaluate to 0 or 1 are warned
about.
use the /g modifier. Currently, /c is meaningful only when /g is
used. (This may change in the future.)
-=item Use of freed value in iteration (perhaps you modified the iterated array within the loop?)
+=item Use of freed value in iteration
-(F) This is typically caused by code like the following:
+(F) Perhaps you modified the iterated array within the loop?
+This error is typically caused by code like the following:
@a = (3,4);
@a = () for (1,2,@a);
(F) You attempted to use a feature of printf that is accessible from
only C. This usually means there's a better way to do it in Perl.
-=item Use of $# is deprecated
-
-(D deprecated) This was an ill-advised attempt to emulate a poorly
-defined B<awk> feature. Use an explicit printf() or sprintf() instead.
-
=item Use of %s is deprecated
(D deprecated) The construct indicated is no longer recommended for use,
defined. It was interpreted as a "" or a 0, but maybe it was a mistake.
To suppress this warning assign a defined value to your variables.
-To help you figure out what was undefined, perl tells you what operation
-you used the undefined value in. Note, however, that perl optimizes your
-program and the operation displayed in the warning may not necessarily
-appear literally in your program. For example, C<"that $foo"> is
-usually optimized into C<"that " . $foo>, and the warning will refer to
-the C<concatenation (.)> operator, even though there is no C<.> in your
-program.
+To help you figure out what was undefined, perl will try to tell you the
+name of the variable (if any) that was undefined. In some cases it cannot
+do this, so it also tells you what operation you used the undefined value
+in. Note, however, that perl optimizes your program and the operation
+displayed in the warning may not necessarily appear literally in your
+program. For example, C<"that $foo"> is usually optimized into C<"that "
+. $foo>, and the warning will refer to the C<concatenation (.)> operator,
+even though there is no C<.> in your program.
=item Using a hash as a reference is deprecated
(W closure) During compilation, an inner named subroutine or eval is
attempting to capture an outer lexical that is not currently available.
-This can be happen for one of two reasons. First, the outer lexical may be
+This can happen for one of two reasons. First, the outer lexical may be
declared in an outer anonymous subroutine that has not yet been created.
(Remember that named subs are created at compile time, while anonymous
-subs are created at run-time. For example,
+subs are created at run-time.) For example,
sub { my $a; sub f { $a } }
its equivalent C<BEGIN> block found an internal inconsistency with
the version number.
+=item Version string '%s' contains invalid data; ignoring: '%s'
+
+(W misc) The version string contains invalid characters at the end, which
+are being ignored.
+
=item v-string in use/require is non-portable
(W portable) The use of v-strings is non-portable to older, pre-5.6, Perls.
(F) You had a pack template that specified a relative position after
the end of the string being unpacked. See L<perlfunc/pack>.
-=item Xsub "%s" called in sort
-
-(F) The use of an external subroutine as a sort comparison is not yet
-supported.
-
-=item Xsub called in sort
-
-(F) The use of an external subroutine as a sort comparison is not yet
-supported.
-
=item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!
(F) And you probably never will, because you probably don't have the
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