fix corner case in comparisons (#5486)

fixes #5485
2022-06-04 17:47:38 +01:00
parent ad5f5ef2a3
commit a025392a30
4 changed files with 52 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1559,7 +1559,10 @@ Compressor.prototype.compress = function(node) {

    AST_SymbolRef.DEFMETHOD("is_immutable", function() {
        var def = this.redef || this.definition();
-        return (this.in_arg || def.orig.length == 1) && def.orig[0] instanceof AST_SymbolLambda;
+        if (!(def.orig[0] instanceof AST_SymbolLambda)) return false;
+        if (def.orig.length == 1) return true;
+        if (!this.in_arg) return false;
+        return !(def.orig[1] instanceof AST_SymbolFunarg);
    });

    AST_Node.DEFMETHOD("convert_symbol", noop);