fix corner case in functions & reduce_vars (#4452)

fixes #4451
2020-12-25 00:38:24 +00:00
parent ced32f9bd8
commit b2f27fd873
2 changed files with 28 additions and 4 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -933,10 +933,10 @@ merge(Compressor.prototype, {
                        def.fixed = false;
                    }
                }, true);
-            } else if (init instanceof AST_SymbolRef && !init.is_immutable()) {
+            } else if (init instanceof AST_SymbolRef) {
                var def = init.definition();
                def.assignments++;
-                def.fixed = false;
+                if (!init.is_immutable()) def.fixed = false;
            }
            this.body.walk(tw);
            pop(tw);