From 88e60c309c0e05970cfed012f5b1eae98ad92bbb Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Thu, 12 Sep 2024 17:28:53 -0500
Subject: [PATCH] Add overflow check.

---
 src/core/peg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/peg.c b/src/core/peg.c
index 0a2b7d4f..f2e70213 100644
--- a/src/core/peg.c
+++ b/src/core/peg.c
@@ -498,6 +498,7 @@ tail:
 
         case RULE_NTH: {
             uint32_t nth = rule[1];
+            if (nth > INT32_MAX) nth = INT32_MAX;
             uint32_t tag = rule[3];
             int oldmode = s->mode;
             CapState cs = cap_save(s);