include reassignments that are ignored on initial pass

src/Bundle.js

@@ -75,10 +75,19 @@ export default class Bundle {
 				});
 
 				// mark statements that should appear in the bundle
-				if ( this.aggressive ) {
-					entryModule.markStatements();
-				} else {
-					this.modules.forEach( module => module.markStatements() );
+				let settled = false;
+				while ( !settled ) {
+					settled = true;
+
+					if ( this.aggressive ) {
+						settled = !entryModule.markStatements();
+					} else {
+						this.modules.forEach( module => {
+							if ( module.markStatements() ) {
+								settled = false;
+							}
+						});
+					}
 				}
 
 				this.orderedModules = this.sort();

src/Module.js

@@ -279,9 +279,13 @@ export default class Module {
 	}
 
 	markStatements () {
+		let marked = false;
+
 		this.statements.forEach( statement => {
-			statement.secondPass( this.strongDependencies );
+			marked = marked || statement.secondPass( this.strongDependencies );
 		});
+
+		return marked;
 	}
 
 	namespace () {

src/Statement.js

@@ -157,7 +157,8 @@ export default class Statement {
 	}
 
 	secondPass ( strongDependencies ) {
-		if ( this.isImportDeclaration || this.isFunctionDeclaration ) return;
+		if ( ( this.tested && this.isIncluded ) || this.isImportDeclaration || this.isFunctionDeclaration ) return;
+		this.tested = true;
 
 		if ( testForSideEffects( this.node, this.scope, this, strongDependencies ) ) {
 			this.mark();

test/function/includes-reassignments/_config.js

@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'includes reassignments that are ignored on an initial pass'
+};

test/function/includes-reassignments/foo.js

@@ -0,0 +1,9 @@
+var answer, getAnswer;
+
+getAnswer = function () {
+	return 42;
+};
+
+answer = getAnswer();
+
+export default answer;

test/function/includes-reassignments/main.js

@@ -0,0 +1,3 @@
+import answer from './foo.js';
+
+assert.equal( answer, 42 );