applied patch, reformatted long lines in places

	Message-Id: <v03110703b1cc32a02438@[195.95.102.91]>
	Subject: [PATCH 5.004_71] Re: Document "count exceeded" regular expression
	 warning

p4raw-id: //depot/perl@1432

1 files changed, 12 insertions, 0 deletions

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index a0505e4bba..e1967840bd 100644
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -978,6 +978,18 @@ to 01411.  Octal constants are introduced with a leading 0 in Perl, as in C.
 Perl uses this generic message when none of the errors that it encountered
 were severe enough to halt compilation immediately.
 
+=item Complex regular subexpression recursion limit (%d) exceeded
+
+(W) The regular expression engine uses recursion in complex situations
+where back-tracking is required.  Recursion depth is limited to 32766,
+or perhaps less in architectures where the stack cannot grow
+arbitrarily.  ("Simple" and "medium" situations are handled without
+recursion and are not subject to a limit.)  Try shortening the string
+under examination; looping in Perl code (e.g. with C<while>) rather
+than in the regular expression engine; or rewriting the regular
+expression so that it is simpler or backtracks less.  (See L<perlbook>
+for information on I<Mastering Regular Expressions>.)
+
 =item connect() on closed fd
 
 (W) You tried to do a connect on a closed socket.  Did you forget to check