From 1637a3e67d5a102cf33e98fe5437a50c644e5cf9 Mon Sep 17 00:00:00 2001
From: Anders Kaseorg <andersk@mit.edu>
Date: Fri, 13 Oct 2023 18:04:07 -0700
Subject: [PATCH] Fix scope lookup with optional catch binding

Fixes #944.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
---
 src/scope.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scope.ts b/src/scope.ts
index 24f554ea..0d92a3eb 100644
--- a/src/scope.ts
+++ b/src/scope.ts
@@ -197,7 +197,7 @@ export default function scopePlugin(fork: Fork) {
       }
     }
     if (ScopeType.check(node)) {
-      if (namedTypes.CatchClause.check(node)) {
+      if (namedTypes.CatchClause.check(node) && node.param !== null) {
         // A catch clause establishes a new scope but the only variable
         // bound in that scope is the catch parameter. Any other
         // declarations create bindings in the outer scope.