Bah; r4954 introduced an array overrun.

[originally from svn r4955]
[r4954 == 47e9419452a9fca895f1c84412ab1040d1aa86a5]

diff --git a/pattern.c b/pattern.c
index ca71fba241c165e0b3d949c7e6a8ebb4c8b8962d..e7b99b31f53bf6a20a7409037b25d4f79ba3f975 100644 (file)
--- a/pattern.c
+++ b/pattern.c
@@ -330,7 +330,7 @@ int compute_rowdata(int *ret, unsigned char *start, int len, int step)
             i += runlen;
         }
 
-        if (start[i*step] == GRID_UNKNOWN)
+        if (i < len && start[i*step] == GRID_UNKNOWN)
             return -1;
     }