(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 topicaizer
+=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"
(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.
(F) You tried to unshift an "unreal" array that can't be unshifted, such
as the main Perl stack.
-=item Can't upgrade that kind of scalar
+=item Can't upgrade %s (%d) to %d
(P) The internal sv_upgrade routine adds "members" to an SV, making it
into a more specialized kind of SV. The top several SV types are so
specialized, however, that they cannot be interconverted. This message
indicates that such a conversion was attempted.
-=item Can't upgrade to undef
-
-(P) The undefined SV is the bottom of the totem pole, in the scheme of
-upgradability. Upgrading to undef indicates an error in the code
-calling sv_upgrade.
-
=item Can't use anonymous symbol table for method lookup
(F) The internal routine that does method lookup was handed a symbol
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,
(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
(W misc) You used the obsolescent C<dump()> built-in function, without fully
qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
+=item dump is not supported
+
+(F) Your machine doesn't support dump/undump.
+
=item Duplicate free() ignored
(S malloc) An internal routine called free() on something that had
internally--subject to loss of precision errors in subsequent
operations.
+=item Integer overflow in division
+
+(F) In the scope of the C<use integer;> pragma, division would have overflowed.
+This will happen if you attempt to divide the largest negative integer by -1,
+since the result cannot be represented as a signed integer on a two's complement
+system. This division is trapped as a Perl-level exception because on some
+architectures the integer divide operation will trigger a CPU exception
+causing program exit, rather than merely returning a mathematically wrong
+answer.
+
=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
+(F) The indexes and widths specified in the format string of C<printf()>
+or C<sprintf()> are too large. The numbers must not overflow the size of
integers for your architecture.
=item Integer overflow in version
(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 tried to allocate more memory than possible.
-=item panic: null array
-
-(P) One of the internal array routines was passed a null AV pointer.
-
=item panic: pad_alloc
(P) The compiler got confused about which scratch pad it was allocating
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
(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
(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.
(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
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.
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