Fix infinite loop in v-flag regexp validation

Issue #1221
acornjs · Jun 16, 2023 · 8906b82 · 8906b82
1 parent 3d90580
commit 8906b82
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/acorn/src/regexp.js b/acorn/src/regexp.js
@@ -1112,7 +1112,7 @@ pp.regexp_eatClassSetCharacter = function(state) {
     return false
   }
   const ch = state.current()
-  if (ch === state.lookahead() && isClassSetReservedDoublePunctuatorCharacter(ch)) return false
+  if (ch < 0 || ch === state.lookahead() && isClassSetReservedDoublePunctuatorCharacter(ch)) return false
   if (isClassSetSyntaxCharacter(ch)) return false
   state.advance()
   state.lastIntValue = ch