diff options
| -rw-r--r-- | src/regex.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/regex.c b/src/regex.c index 7128c4e87c1..e6d04a57df5 100644 --- a/src/regex.c +++ b/src/regex.c @@ -1004,7 +1004,7 @@ static const char *re_error_msgid[] = #endif /* Roughly the maximum number of failure points on the stack. Would be - exactly that if always used MAX_FAILURE_SPACE each time we failed. + exactly that if always used MAX_FAILURE_ITEMS items each time we failed. This is a variable only so users of regex can assign to it; we never change it ourselves. */ #if defined (MATCH_MAY_ALLOCATE) @@ -1221,7 +1221,10 @@ typedef struct #endif /* We push at most this many items on the stack. */ -#define MAX_FAILURE_ITEMS ((num_regs - 1) * NUM_REG_ITEMS + NUM_NONREG_ITEMS) +/* We used to use (num_regs - 1), which is the number of registers + this regexp will save; but that was changed to 5 + to avoid stack overflow for a regexp with lots of parens. */ +#define MAX_FAILURE_ITEMS (5 * NUM_REG_ITEMS + NUM_NONREG_ITEMS) /* We actually push this many items. */ #define NUM_FAILURE_ITEMS \ |