regex: don't loop 10000 identical matches to find a single $ anchor

Change-Id: Ic130ecc4b0b6d58ba7ef063040bd9a11a90db425

1 files changed, 5 insertions, 0 deletions

diff --git a/i18npool/source/search/textsearch.cxx b/i18npool/source/search/textsearch.cxx
index 14ecdcc1059d..997b01dd6afa 100644
--- a/i18npool/source/search/textsearch.cxx
+++ b/i18npool/source/search/textsearch.cxx
@@ -752,6 +752,11 @@ SearchResult TextSearch::RESrchFrwrd( const OUString& searchStr,
         int nEndOfs = pRegexMatcher->end( nIcuErr);
         if( nStartOfs < nEndOfs)
             break;
+        // If the zero-length match is behind the string, do not match it again
+        // and again until startPos reaches there. A match behind the string is
+        // a "$" anchor.
+        if (nStartOfs == endPos)
+            break;
         // try at next position if there was a zero-length match
         if( ++startPos >= endPos)
             return aRet;