X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperlreguts.pod;h=9c54ec4aacb95670352cd14bed71a47e3699be52;hb=18fd877aa5c85a3f8bdc7cb30b117cf8f0fe97a6;hp=204993165c2e74f38ffe70504f3eb986fd581fc7;hpb=0a3a8dc0cd7227e83cd26fe236d1ad57c4add668;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pod/perlreguts.pod b/pod/perlreguts.pod
index 2049931..9c54ec4 100644
--- a/pod/perlreguts.pod
+++ b/pod/perlreguts.pod
@@ -810,13 +810,12 @@ value to other engine implementations.
 
 =item C<swap>
 
-C<swap> is an extra set of startp/endp stored in a C<regexp_paren_ofs>
-struct. This is used when the last successful match was from the same pattern
-as the current pattern, so that a partial match doesn't overwrite the
-previous match's results. When this field is data filled the matching
-engine will swap buffers before every match attempt. If the match fails,
-then it swaps them back. If it's successful it leaves them. This field
-is populated on demand and is by default null.
+C<swap> formerly was an extra set of startp/endp stored in a
+C<regexp_paren_ofs> struct. This was used when the last successful match
+was from the same pattern as the current pattern, so that a partial
+match didn't overwrite the previous match's results, but it caused a
+problem with re-entrant code such as trying to build the UTF-8 swashes.
+Currently unused and left for backward compatibility with 5.10.0.
 
 =item C<offsets>