fix corner case in collapse_vars (#3672)

fixes #3671
2020-01-07 19:34:16 +08:00
parent d17191111a
commit 4d6771b9b1
2 changed files with 28 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1367,7 +1367,7 @@ merge(Compressor.prototype, {
                if (replace_all) return false;
                return node instanceof AST_SymbolRef
                    && !node.is_declared(compressor)
-                    && !(parent instanceof AST_Assign && parent.left === node);
+                    && !(parent instanceof AST_Assign && parent.operator == "=" && parent.left === node);
            }

            function in_conditional(node, parent) {