Fix wrong first character when a backreference with a zero repeat is first

(apart from assersions) in a pattern.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1719 2f5784b3-3f2a-0410-8824-cb99058d5e15

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index d90ae78..395b88d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -31,6 +31,11 @@ were all int variables, causing overflow when files with more than 2147483647
 lines were processed (assuming 32-bit ints). They have all been changed to 
 unsigned long ints.
 
+7. If a backreference with a minimum repeat count of zero was first in a
+pattern, apart from assertions, an incorrect first matching character could be
+recorded. For example, for the pattern /(?=(a))\1?b/, "b" was incorrectly set
+as the first character of a match.
+
 
 Version 8.41 05-July-2017
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