rename internal namespace exports as appropriate

src/Bundle.js

@@ -323,7 +323,10 @@ export default class Bundle {
 			const exportKeys = keys( module.exports );
 
 			return `var ${module.getCanonicalName('*', format === 'es6')} = {\n` +
-				exportKeys.map( key => `${indentString}get ${key} () { return ${module.getCanonicalName(key, format === 'es6')}; }` ).join( ',\n' ) +
+				exportKeys.map( key => {
+					const localName = module.exports[ key ].localName;
+					return `${indentString}get ${key} () { return ${module.getCanonicalName(localName, format === 'es6')}; }`;
+				}).join( ',\n' ) +
 			`\n};\n\n`;
 		}).join( '' );
 

test/function/import-namespace-from-internal-module-renamed/_config.js

@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'correctly exports x as y inside a bundle'
+};

test/function/import-namespace-from-internal-module-renamed/foo.js

@@ -0,0 +1,3 @@
+var x = 42;
+
+export { x as y };

test/function/import-namespace-from-internal-module-renamed/main.js

@@ -0,0 +1,3 @@
+import * as foo from './foo';
+
+assert.equal( foo.y, 42 );

test/function/uses-supplied-ast/_config.js

@@ -30,6 +30,5 @@ module.exports = {
 
 			return modules[ id ];
 		}
-	},
+	}
-	solo: true
 };