Fix for the working case

Author: orta

package-lock.json

@@ -25,6 +25,6 @@
     "monaco-plugin-helpers": "^1.0.2",
     "requirejs": "^2.3.6",
     "terser": "^4.6.3",
-    "typescript": "^3.8.2"
+    "typescript": "^3.9.0-dev.20200407"
   }
 }

package.json

@@ -51,9 +51,11 @@ export const typescriptVersion = "${typeScriptDependencyVersion}";\n`
 	// ^\s+\*[^/] matches (presumably) a later line of a multi-line comment.
 	const tsServicesNoCommentedRequire = tsServices.replace(/(\/[*/]|^\s+\*[^/]).*\brequire\(.*/gm, '');
 	const linesWithRequire = tsServicesNoCommentedRequire.match(/^.*?\brequire\(.*$/gm)
-	  .filter(l => !l.includes(": diag(")) // Allow error messages to include references to require() in their strings
 
-	if (linesWithRequire && linesWithRequire.length) {
+	// Allow error messages to include references to require() in their strings
+	const runtimeRequires = linesWithRequire && linesWithRequire.filter(l => !l.includes(": diag("))
+
+	if (runtimeRequires && runtimeRequires.length) {
 		console.error('Found new require() calls on the following lines. These should be removed to avoid breaking webpack builds.\n');
 		console.error(linesWithRequire.join('\n'));
 		process.exit(1);

scripts/importTypescript.js

@@ -2,4 +2,4 @@
 // **NOTE**: Do not edit directly! This file is generated using `npm run import-typescript`
 //
 
-export const typescriptVersion = "3.8.3";
+export const typescriptVersion = "3.9.0-dev.20200407";