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node_modules/webpack/lib/ErrorHelpers.js

@@ -6,17 +6,40 @@
 
 const loaderFlag = "LOADER_EXECUTION";
 
-exports.cutOffLoaderExecution = (stack) => {
+const webpackOptionsFlag = "WEBPACK_OPTIONS";
+
+exports.cutOffByFlag = (stack, flag) => {
 	stack = stack.split("\n");
-	for(let i = 0; i < stack.length; i++)
-		if(stack[i].indexOf(loaderFlag) >= 0)
+	for (let i = 0; i < stack.length; i++) {
+		if (stack[i].includes(flag)) {
 			stack.length = i;
+		}
+	}
 	return stack.join("\n");
 };
 
+exports.cutOffLoaderExecution = stack =>
+	exports.cutOffByFlag(stack, loaderFlag);
+
+exports.cutOffWebpackOptions = stack =>
+	exports.cutOffByFlag(stack, webpackOptionsFlag);
+
+exports.cutOffMultilineMessage = (stack, message) => {
+	stack = stack.split("\n");
+	message = message.split("\n");
+
+	return stack
+		.reduce(
+			(acc, line, idx) =>
+				line.includes(message[idx]) ? acc : acc.concat(line),
+			[]
+		)
+		.join("\n");
+};
+
 exports.cutOffMessage = (stack, message) => {
 	const nextLine = stack.indexOf("\n");
-	if(nextLine === -1) {
+	if (nextLine === -1) {
 		return stack === message ? "" : stack;
 	} else {
 		const firstLine = stack.substr(0, nextLine);
@@ -29,3 +52,9 @@ exports.cleanUp = (stack, message) => {
 	stack = exports.cutOffMessage(stack, message);
 	return stack;
 };
+
+exports.cleanUpWebpackOptions = (stack, message) => {
+	stack = exports.cutOffWebpackOptions(stack);
+	stack = exports.cutOffMultilineMessage(stack, message);
+	return stack;
+};