Move declaration assignment before the if statement

src/Declaration.js

@@ -76,10 +76,12 @@ export class SyntheticDefaultDeclaration {
 	}
 
 	addReference ( reference ) {
+		// Bind the reference to `this` declaration.
+		reference.declaration = this;
+
 		// Don't change the name to `default`; it's not a valid identifier name.
 		if ( reference.name === 'default' ) return;
 
-		reference.declaration = this;
 		this.name = reference.name;
 	}
 

test/function/resolves-namespace-default/_config.js

@@ -0,0 +1,9 @@
+var assert = require('assert');
+
+module.exports = {
+  description: "namespace's 'default' properties should be available",
+
+  exports: function ( exports ) {
+    assert.equal( exports, 42 );
+  }
+};

test/function/resolves-namespace-default/main.js

@@ -0,0 +1,3 @@
+import * as mod from './mod.js';
+
+export default mod.default();

test/function/resolves-namespace-default/mod.js

@@ -0,0 +1 @@
+export default () => 42;