perldiag: Document ‘Slab leaked from cv’

[perl5.git] / pod / perldiag.pod

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 88ba1a5..8aed54e 100644 (file)
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -1426,7 +1426,7 @@ another template code following the slash.  See L<perlfunc/pack>.
 
 =item Code point 0x%X is not Unicode, all \p{} matches fail; all \P{} matches succeed
 
-(W utf8, non_unicode) You had a code point above the Unicode maximum
+(S utf8, non_unicode) You had a code point above the Unicode maximum
 of U+10FFFF.
 
 Perl allows strings to contain a superset of Unicode code points, up
@@ -1449,13 +1449,13 @@ will match.
 
 This may be counterintuitive at times, as both these fail:
 
- chr(0x110000) =~ \p{ASCII_Hex_Digit=True}      # Fails.
- chr(0x110000) =~ \p{ASCII_Hex_Digit=False}     # Also fails!
+ chr(0x110000) =~ /\p{ASCII_Hex_Digit=True}/      # Fails.
+ chr(0x110000) =~ /\p{ASCII_Hex_Digit=False}/     # Also fails!
 
 and both these succeed:
 
- chr(0x110000) =~ \P{ASCII_Hex_Digit=True}      # Succeeds.
- chr(0x110000) =~ \P{ASCII_Hex_Digit=False}     # Also succeeds!
+ chr(0x110000) =~ /\P{ASCII_Hex_Digit=True}/      # Succeeds.
+ chr(0x110000) =~ /\P{ASCII_Hex_Digit=False}/     # Also succeeds!
 
 =item %s: Command not found
 
@@ -3381,7 +3381,7 @@ the C<fallback> overloading key is specified to be true.  See L<overload>.
 
 =item Operation "%s" returns its argument for non-Unicode code point 0x%X
 
-(W utf8, non_unicode) You performed an operation requiring Unicode
+(S utf8, non_unicode) You performed an operation requiring Unicode
 semantics on a code point that is not in Unicode, so what it should do
 is not defined.  Perl has chosen to have it do nothing, and warn you.
 
@@ -3393,7 +3393,7 @@ C<no warnings 'non_unicode';>.
 
 =item Operation "%s" returns its argument for UTF-16 surrogate U+%X
 
-(W utf8, surrogate) You performed an operation requiring Unicode
+(S utf8, surrogate) You performed an operation requiring Unicode
 semantics on a Unicode surrogate.  Unicode frowns upon the use of
 surrogates for anything but storing strings in UTF-16, but semantics
 are (reluctantly) defined for the surrogates, and they are to do
@@ -4473,6 +4473,12 @@ superfluous.
 (W signal) The signal handler named in %SIG doesn't, in fact, exist.
 Perhaps you put it into the wrong package?
 
+=item Slab leaked from cv %p
+
+(S) If you see this message, then something is seriously wrong with the
+internal bookkeeping of op trees.  An op tree needed to be freed after
+a compilation error, but could not be found, so it was leaked instead.
+
 =item Smart matching a non-overloaded object breaks encapsulation
 
 (F) You should not use the C<~~> operator on an object that does not
@@ -4948,7 +4954,7 @@ internal consistency check.  It encountered a malformed op tree.
 
 =item Unicode non-character U+%X is illegal for open interchange
 
-(W utf8, nonchar) Certain codepoints, such as U+FFFE and U+FFFF, are
+(S utf8, nonchar) 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.  If you know what you are doing
@@ -4956,7 +4962,7 @@ you can turn off this warning by C<no warnings 'nonchar';>.
 
 =item Unicode surrogate U+%X is illegal in UTF-8
 
-(W utf8, surrogate) You had a UTF-16 surrogate in a context where they are
+(S utf8, surrogate) 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