[parser] disallow language mode directive in body of function with non-simple parameters

test/mjsunit/harmony/spread-call-super-property.js

Index: test/mjsunit/harmony/spread-call-super-property.js
diff --git a/test/mjsunit/harmony/spread-call-super-property.js b/test/mjsunit/harmony/spread-call-super-property.js
index cdf6f2e242268ab6df3bf5a9c378cfc7fe67e4bf..1eb2abc3b0433a99051b39f8b76775fbfea81b2a 100644
--- a/test/mjsunit/harmony/spread-call-super-property.js
+++ b/test/mjsunit/harmony/spread-call-super-property.js
@@ -4,17 +4,28 @@
 
 // Flags: --harmony-spreadcalls --harmony-sloppy --harmony-rest-parameters
 
-(function testCallSuperProperty() {
+(function testCallSuperPropertyStrict() {
+  "use strict";
   class BaseClass {
-    strict_method(...args) { "use strict"; return [this].concat(args); }
-    sloppy_method(...args) { return [this].concat(args); }
+    method(...args) { return [this].concat(args); }
   }
   class SubClass extends BaseClass {
-    strict_m(...args) { return super.strict_method(...args); }
-    sloppy_m(...args) { return super.sloppy_method(...args); }
+    method(...args) { return super.method(...args); }
   }
 
   var c = new SubClass();
-  assertEquals([c, 1, 2, 3, 4, 5], c.strict_m(1, 2, 3, 4, 5));
-  assertEquals([c, 1, 2, 3, 4, 5], c.sloppy_m(1, 2, 3, 4, 5));
+  assertEquals([c, 1, 2, 3, 4, 5], c.method(1, 2, 3, 4, 5));
+})();
+
+
+(function testCallSuperPropertySloppy() {
+  class BaseClass {
+    method(...args) { return [this].concat(args); }
+  }
+  class SubClass extends BaseClass {
+    method(...args) { return super.method(...args); }
+  }
+
+  var c = new SubClass();
+  assertEquals([c, 1, 2, 3, 4, 5], c.method(1, 2, 3, 4, 5));
 })();