Sync dfa with GNULIB.

1 files changed, 6 insertions, 0 deletions

diff --git a/dfa.c b/dfa.c
index 0a231050..ae64ba95 100644
--- a/dfa.c
+++ b/dfa.c
@@ -2652,6 +2652,12 @@ dfastate (state_num s, struct dfa *d, unsigned char uc, state_num trans[])
             continue;
           if (j == CHARCLASS_WORDS)
             continue;
+
+          /* If we have reset the bit that made us declare "matched", reset
+             that indicator, too.  This is required to avoid an infinite loop
+             with this command: echo cx | LC_ALL=C grep -E 'c\b[x ]'  */
+          if (!tstbit (uc, matches))
+            matched = false;
         }
 
 #ifdef DEBUG