listener: fix buggy balanced line check.

* parser.c (is_balanced_line): When handling the closing
characters, we must look for the state type which matches the
character type, not state[sp]. Of course state[sp] == match,
since we initialized it that way, and so state[sp] != match
is always false. We want match to be derived from the
character ch, not from state[sp]. Also, the polarity in the
match-not-found return case is wrong; we must return 0.

1 files changed, 7 insertions, 2 deletions

diff --git a/parser.c b/parser.c
index a0c51292..60d98df3 100644
--- a/parser.c
+++ b/parser.c
@@ -1155,12 +1155,17 @@ static int is_balanced_line(const wchar_t *line, void *ctx)
         break;
       case ')': case ']': case '}':
         {
-          enum state match = state[sp];
+          enum state match = 0;
+          switch (ch) {
+          case ')': match = ST_PAR; break;
+          case ']': match = ST_BKT; break;
+          case '}': match = ST_BRC; break;
+          }
 
           while (sp > 0 && state[sp] != match)
             sp--;
           if (state[sp] != match)
-            return 1;
+            return 0;
           if (count[sp] == 0)
             sp--;
           else