fix incorrect optimization bailout messages

fixes #6570

lib/optimize/ModuleConcatenationPlugin.js

@@ -375,21 +375,16 @@ class ModuleConcatenationPlugin {
 			}
 		}
 
+		// Commit experimental changes
+		config.set(testConfig);
+
 		// Eagerly try to add imports too if possible
 		for (const imp of this.getImports(module)) {
-			const problem = this.tryToAdd(
-				testConfig,
-				imp,
-				possibleModules,
-				failureCache
-			);
+			const problem = this.tryToAdd(config, imp, possibleModules, failureCache);
 			if (problem) {
-				config.addWarning(module, problem);
+				config.addWarning(imp, problem);
 			}
 		}
-
-		// Commit experimental changes
-		config.set(testConfig);
 		return null;
 	}
 }

test/statsCases/scope-hoisting-bailouts/concatenated.js

@@ -0,0 +1 @@
+import "./concatenated1";

test/statsCases/scope-hoisting-bailouts/concatenated1.js

@@ -0,0 +1 @@
+import { x } from "./concatenated2";

test/statsCases/scope-hoisting-bailouts/concatenated2.js

@@ -0,0 +1,2 @@
+import { y } from "external";
+export var x = y;

test/statsCases/scope-hoisting-bailouts/expected.txt

@@ -1,21 +1,29 @@
-Hash: 2f9dacd48c09c3072b04
+Hash: 123228577e0595ae0a8e
 Time: Xms
 Built at: Thu Jan 01 1970 00:00:00 GMT
 Entrypoint index = index.js
 Entrypoint entry = entry.js
-   [0] ./entry.js 32 bytes {0} {1} [built]
+   [0] ./entry.js 32 bytes {1} {2} [built]
        ModuleConcatenation bailout: Module is an entry point
-   [1] ./ref-from-cjs.js 45 bytes {0} [built]
+   [1] ./ref-from-cjs.js 45 bytes {1} [built]
        ModuleConcatenation bailout: Module is referenced from these modules with unsupported syntax: ./cjs.js (referenced with cjs require)
-   [2] ./index.js 150 bytes {0} [built]
+   [2] external "external" 42 bytes {1} [built]
+       ModuleConcatenation bailout: Module is not an ECMAScript module
+   [3] ./concatenated.js + 2 modules 116 bytes {0} [built]
+       ModuleConcatenation bailout: Cannot concat with external "external" (<- Module is not an ECMAScript module)
+       | ./concatenated.js 26 bytes [built]
+       |    ModuleConcatenation bailout: Module is referenced from these modules with unsupported syntax: ./index.js (referenced with import())
+       | ./concatenated1.js 37 bytes [built]
+       | ./concatenated2.js 48 bytes [built]
+   [4] ./index.js 176 bytes {1} [built]
        ModuleConcatenation bailout: Module is an entry point
-   [3] ./cjs.js 59 bytes {0} [built]
+   [5] ./cjs.js 59 bytes {1} [built]
        ModuleConcatenation bailout: Module is not an ECMAScript module
-   [4] ./eval.js 35 bytes {0} [built]
+   [6] ./eval.js 35 bytes {1} [built]
        ModuleConcatenation bailout: Module uses eval()
-   [5] ./injected-vars.js 40 bytes {0} [built]
+   [7] ./injected-vars.js 40 bytes {1} [built]
        ModuleConcatenation bailout: Module uses injected variables (__dirname, __filename)
-   [6] ./module-id.js 26 bytes {0} [built]
+   [8] ./module-id.js 26 bytes {1} [built]
        ModuleConcatenation bailout: Module uses module.id
-   [7] ./module-loaded.js 30 bytes {0} [built]
+   [9] ./module-loaded.js 30 bytes {1} [built]
        ModuleConcatenation bailout: Module uses module.loaded

test/statsCases/scope-hoisting-bailouts/index.js

@@ -5,3 +5,4 @@ import "./injected-vars";
 import "./module-id";
 import "./module-loaded";
 import "./ref-from-cjs";
+import("./concatenated");

test/statsCases/scope-hoisting-bailouts/webpack.config.js

@@ -8,6 +8,7 @@ module.exports = {
 	output: {
 		filename: "[name].js"
 	},
+	externals: ["external"],
 	stats: {
 		assets: false,
 		optimizationBailout: true