export-ns: case for runtime error when importing default from * as

test/language/module-code/instn-iee-err-dflt-thru-star-as-namespace-dflt_FIXTURE.js

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+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+var x;
+export { x as default };

test/language/module-code/instn-iee-err-dflt-thru-star-as-namespace-int_FIXTURE.js

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+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+export * as namespace from './instn-iee-err-dflt-thru-star-namespace-dflt_FIXTURE.js';

test/language/module-code/instn-iee-err-dflt-thru-star-as-namespace.js

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+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: IndirectExportEntries validation - default not found (excluding * as namespace)
+esid: sec-moduledeclarationinstantiation
+info: |
+    [...]
+    9. For each ExportEntry Record e in module.[[IndirectExportEntries]], do
+       a. Let resolution be ? module.ResolveExport(e.[[ExportName]], « », « »).
+       b. If resolution is null or resolution is "ambiguous", throw a
+          SyntaxError exception.
+    [...]
+
+    15.2.1.16.3 ResolveExport
+
+    [...]
+    6. If SameValue(exportName, "default") is true, then
+       a. Assert: A default export was not explicitly defined by this module.
+       b. Throw a SyntaxError exception.
+       c. NOTE A default export cannot be provided by an export *.
+negative:
+  phase: runtime
+  type: SyntaxError
+flags: [module]
+---*/
+
+export { default as x } from './instn-iee-err-dflt-thru-star-as-namespace-int_FIXTURE.js';