stop false missing export errors

src/Module.js

@@ -444,13 +444,14 @@ export default class Module {
 
 	markExport ( name, suggestedName, importer ) {
 		const reexport = this.reexports[ name ];
+		const exportDeclaration = this.exports[ name ];
+
 		if ( reexport ) {
 			reexport.isUsed = true;
 			reexport.module.markExport( reexport.localName, suggestedName, this );
 		}
 
-		const exportDeclaration = this.exports[ name ];
-		if ( exportDeclaration ) {
+		else if ( exportDeclaration ) {
 			exportDeclaration.isUsed = true;
 			if ( name === 'default' ) {
 				this.needsDefault = true;
@@ -458,9 +459,10 @@ export default class Module {
 				return exportDeclaration.statement.mark();
 			}
 
-			return this.mark( exportDeclaration.localName );
+			this.mark( exportDeclaration.localName );
 		}
 
+		else {
 			// See if there exists an export delegate that defines `name`.
 			let i;
 			for ( i = 0; i < this.exportAlls.length; i += 1 ) {
@@ -481,6 +483,7 @@ export default class Module {
 
 			throw new Error( `Module ${this.id} does not export ${name} (imported by ${importer.id})` );
 		}
+	}
 
 	parse ( ast ) {
 		// The ast can be supplied programmatically (but usually won't be)