rename variables named `exports`

src/Bundle.js

@@ -39,7 +39,9 @@ export default class Bundle {
 		this.statements = null;
 		this.externalModules = [];
 		this.internalNamespaceModules = [];
+
 		this.assumedGlobals = blank();
+		this.assumedGlobals.exports = true; // TODO strictly speaking, this only applies with non-ES6, non-default-only bundles
 	}
 
 	build () {

test/function/deconflicts-exports/_config.js

@@ -0,0 +1,12 @@
+var assert = require( 'assert' );
+
+module.exports = {
+	description: 'renames variables named `exports` if necessary',
+	exports: function ( exports ) {
+		assert.deepEqual( Object.keys( exports ), [ 'a', 'b' ] );
+		assert.equal( exports.a, 'A' );
+		assert.equal( exports.b, 42 );
+	},
+	solo: true,
+	show: true
+};

test/function/deconflicts-exports/main.js

@@ -0,0 +1,8 @@
+var exports = {
+	number: 21
+};
+
+export var a = 'A';
+export var b = exports.number * 2;
+
+assert.deepEqual( Object.keys( exports ), [ 'number' ]);

test/function/export-and-import-reference-share-var/_config.js

@@ -4,8 +4,7 @@ module.exports = {
 	description: 'allows export and import reference to share name',
 	exports: function ( exports ) {
 		assert.equal( exports.b, 9 );
-	},
+	}
-	solo: true
 };
 
 // adapted from es6-module-transpiler