fix corner case in evaluate (#3946)

fixes #3944
2020-06-02 16:50:40 +01:00
parent b24eb22c6b
commit c97ad98f92
2 changed files with 30 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3308,7 +3308,7 @@ merge(Compressor.prototype, {
            }
            var op = this.operator;
            var node;
-            if (HOP(lhs, "_eval") || !(lhs instanceof AST_SymbolRef) || !lhs.fixed_value()) {
+            if (HOP(lhs, "_eval") || !(lhs instanceof AST_SymbolRef) || !lhs.fixed || !lhs.definition().fixed) {
                node = op == "=" ? this.right : make_node(AST_Binary, this, {
                    operator: op.slice(0, -1),
                    left: lhs,