Reject local module declarations.

test/mjsunit/harmony/module-parsing.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 144 matching lines @@
 
 var module
 module = {}
 module["a"] = 6
 function module() {}
 function f(module) { return module }
 try {} catch (module) {}
 
 module
 v = 20
+
+
+
+// Check that module declarations are rejected in eval or local scope.
+
+module M { export let x; }
+
+assertThrows("export x;", SyntaxError);  // It's using eval, so should throw.
+assertThrows("export let x;", SyntaxError);
+assertThrows("import x from M;", SyntaxError);
+assertThrows("module M {};", SyntaxError);
+
+assertThrows("{ export x; }", SyntaxError);
+assertThrows("{ export let x; }", SyntaxError);
+assertThrows("{ import x from M; }", SyntaxError);
+assertThrows("{ module M {}; }", SyntaxError);
+
+assertThrows("function f() { export x; }", SyntaxError);
+assertThrows("function f() { export let x; }", SyntaxError);
+assertThrows("function f() { import x from M; }", SyntaxError);
+assertThrows("function f() { module M {}; }", SyntaxError);
+
+assertThrows("function f() { { export x; } }", SyntaxError);
+assertThrows("function f() { { export let x; } }", SyntaxError);
+assertThrows("function f() { { import x from M; } }", SyntaxError);
+assertThrows("function f() { { module M {}; } }", SyntaxError);