codegen: fix crash with for of no left decl

test262: 11.29% (+0.01) | 🧪 49377 | 🤠 5573 (+3) | ❌ 1248 (+1) | 💀 8684 (+1) | 🧩 2517 | 💥 748 (-6) | ⏰ 2 | 📝 30605 (+1)
CanadaHonk · Feb 13, 2024 · dfa0583 · dfa0583
1 parent 9f8ffb2
commit dfa0583
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/compiler/codeGen.js b/compiler/codeGen.js
@@ -2387,7 +2387,13 @@ const generateForOf = (scope, decl) => {
   // setup local for left
   generate(scope, decl.left);
 
-  const leftName = decl.left.declarations[0].id.name;
+  let leftName = decl.left.declarations?.[0]?.id?.name;
+  if (!leftName && decl.left.name) {
+    leftName = decl.left.name;
+
+    generateVar(scope, { kind: 'var', _bare: true, declarations: [ { id: { name: leftName } } ] })
+  }
+
   const [ local, isGlobal ] = lookupName(scope, leftName);
 
   depth.push('block');