From fee777dd9c6d794f84b24ca9254a5f20ba73542e Mon Sep 17 00:00:00 2001
From: Benjamin Bock <bb@users.noreply.github.com>
Date: Mon, 5 Dec 2016 11:35:38 +0100
Subject: [PATCH] fixes #9123

like https://github.com/otbe/TypeScript/blob/1f43720026c824151217e6ea9991b19e449c85cc/src/compiler/commandLineParser.ts but without removing the open-curly of the function
---
 src/compiler/commandLineParser.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index e9f9ff210a9..b577b7671d4 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -850,6 +850,7 @@ namespace ts {
       */
     export function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions: CompilerOptions = {}, configFileName?: string, resolutionStack: Path[] = []): ParsedCommandLine {
         const errors: Diagnostic[] = [];
+        basePath = normalizeSlashes(basePath);
         const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames);
         const resolvedPath = toPath(configFileName || "", basePath, getCanonicalFileName);
         if (resolutionStack.indexOf(resolvedPath) >= 0) {