Merge pull request #11751 from Knagis/webpack-issue-11743

fix: handle star import name collisions in module concatenation

lib/optimize/ConcatenatedModule.js

@@ -999,7 +999,7 @@ class ConcatenatedModule extends Module {
 						const name = reference.identifier.name;
 						if (ConcatenationScope.isModuleReference(name)) {
 							const match = ConcatenationScope.matchModuleReference(name);
-							if (!match || match.ids.length < 1) continue;
+							if (!match) continue;
 							const binding = getFinalBinding(
 								moduleGraph,
 								modulesWithInfo[match.index],

test/cases/optimize/concat-star-import/index.js

@@ -0,0 +1,5 @@
+import { foo } from "./module";
+
+it("should handle star import with name collision", () => {
+	expect(foo()).toBe("1 21 2");
+});

test/cases/optimize/concat-star-import/module.js

@@ -0,0 +1,7 @@
+import * as c from "cmodule";
+
+export function foo() {
+	// variable name matches the imported package name
+	const cmodule = c([1, 2]);
+	return cmodule + cmodule;
+}