fix corner case in join_vars (#3796)

fixes #3795
2020-04-18 11:08:05 +01:00
parent 708973e51d
commit b38838c6bf
2 changed files with 35 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2371,8 +2371,9 @@ merge(Compressor.prototype, {
                var lhs = expr.left;
                if (!(lhs instanceof AST_SymbolRef)) break;
                if (is_undeclared_ref(lhs)) break;
+                if (lhs.scope !== scope) break;
                var def = lhs.definition();
-                if (def.scope !== lhs.scope) break;
+                if (def.scope !== scope) break;
                if (def.orig.length > def.eliminated + 1) break;
                if (def.orig[0].TYPE != "SymbolVar") break;
                var name = make_node(AST_SymbolVar, lhs, lhs);