From f82d0cb3299c04093e3835bc7e29f5b40475f586 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Wed, 2 Mar 2022 09:13:42 -0800
Subject: [PATCH] Add explicit assertion on somewhat commonly incorrectly
 passed argument (#48078)

* Add explicit assertion on somewhat commonly incorrectly passed argument

* PR feedback
---
 src/compiler/moduleNameResolver.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
index c63cc791782..da2324cc74e 100644
--- a/src/compiler/moduleNameResolver.ts
+++ b/src/compiler/moduleNameResolver.ts
@@ -298,6 +298,7 @@ namespace ts {
      * is assumed to be the same as root directory of the project.
      */
     export function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string | undefined, options: CompilerOptions, host: ModuleResolutionHost, redirectedReference?: ResolvedProjectReference, cache?: TypeReferenceDirectiveResolutionCache, resolutionMode?: SourceFile["impliedNodeFormat"]): ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
+        Debug.assert(typeof typeReferenceDirectiveName === "string", "Non-string value passed to `ts.resolveTypeReferenceDirective`, likely by a wrapping package working with an outdated `resolveTypeReferenceDirectives` signature. This is probably not a problem in TS itself.");
         const traceEnabled = isTraceEnabled(options, host);
         if (redirectedReference) {
             options = redirectedReference.commandLine.options;