use real loader path

lib/NormalModuleFactory.js

@@ -104,15 +104,15 @@ const stringifyLoadersAndResource = (loaders, resource) => {
 const identToLoaderRequest = resultString => {
 	const idx = resultString.indexOf("?");
 	if (idx >= 0) {
-		const loader = resultString.substr(0, idx);
+		const loader = resultString.substr(0, idx).replace(/\0(.)/g, "$1");
 		const options = resultString.substr(idx + 1);
 		return {
 			loader,
 			options
 		};
 	} else {
 		return {
-			loader: resultString,
+			loader: resultString.replace(/\0(.)/g, "$1"),
 			options: undefined
 		};
 	}

test/configCases/loaders/#-issue-14755-#/#.my

@@ -0,0 +1 @@
+[a-z]

test/configCases/loaders/#-issue-14755-#/index.js

@@ -0,0 +1,6 @@
+import regexp from './#.my';
+
+it("should load regexp correctly", () => {
+	expect(regexp.test("1")).toBe(false);
+	expect(regexp.test("a")).toBe(true);
+});

test/configCases/loaders/#-issue-14755-#/webpack.config.js

@@ -0,0 +1,11 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	module: {
+		rules: [
+			{
+				test: /\.my$/,
+				loader: "regexp-#-loader"
+			}
+		]
+	}
+};