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-rw-r--r--lib/compress.js4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index aea3155a..531c9aad 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3344,7 +3344,9 @@ merge(Compressor.prototype, {
if (is_undeclared_ref(this) && this.is_declared(compressor)) return false;
if (this.is_immutable()) return false;
var def = this.definition();
- if (is_arguments(def)) return def.scope.uses_arguments > 2;
+ if (is_arguments(def) && all(def.scope.argnames, function(argname) {
+ return argname instanceof AST_SymbolFunarg;
+ })) return def.scope.uses_arguments > 2;
var fixed = this.fixed_value();
if (!fixed) return true;
this._dot_throw = return_true;