From bee7f78b8a1a6481197cbd075b0bffdd0bb27f4d Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Wed, 1 Oct 2025 11:21:03 -0700
Subject: [PATCH] take issue to throw on

---
 src/compiler/moduleNameResolver.ts | 2 +-
 src/compiler/program.ts            | 7 ++++++-
 src/compiler/types.ts              | 4 ++++
 src/compiler/utilities.ts          | 5 -----
 4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/compiler/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
index 9cdda68f67d..aa738c6f75d 100644
--- a/src/compiler/moduleNameResolver.ts
+++ b/src/compiler/moduleNameResolver.ts
@@ -1673,7 +1673,7 @@ function tryLoadModuleUsingBaseUrl(extensions: Extensions, moduleName: string, l
         trace(state.host, Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, baseUrl, candidate);
     }
     const res = loader(extensions, candidate, !directoryProbablyExists(getDirectoryPath(candidate), state.host), state);
-    if (res) {
+    if (res && state.compilerOptions.issueType === "baseUrl") {
         throw new Error("TS_FIX_BASEURL_SIGNAL");
     }
     return res;
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 3b9b3a60761..663f49247c0 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -315,7 +315,6 @@ import {
     trace,
     tracing,
     tryCast,
-    tsFixRootDirSignal,
     TypeChecker,
     typeDirectiveIsEqualTo,
     TypeReferenceDirectiveResolutionCache,
@@ -2149,6 +2148,12 @@ export function createProgram(_rootNamesOrOptions: readonly string[] | CreatePro
         return ts_toPath(fileName, currentDirectory, getCanonicalFileName);
     }
 
+    function tsFixRootDirSignal(kind: string, rootDir: string, rootDir60: string): void {
+        if (options.issueType === "rootDir") {
+            throw new Error(`TS_FIX_ROOTDIR_SIGNAL:: ${kind}:: 5.9:: ${rootDir} 6.0:: ${rootDir60} <End>`);
+        }
+    }
+
     function getCommonSourceDirectory() {
         let commonSourceDirectory = programDiagnostics.getCommonSourceDirectory();
         if (commonSourceDirectory !== undefined) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index ee7f4338a3a..0c0f3acec96 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -7395,7 +7395,11 @@ export enum PollingWatchKind {
 
 export type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[] | ProjectReference[] | null | undefined; // eslint-disable-line no-restricted-syntax
 
+/** @internal */
+export type IssueType = "baseUrl" | "rootDir" | "types";
+
 export interface CompilerOptions {
+    /** @internal */ issueType?: IssueType;
     /** @internal */ all?: boolean;
     allowImportingTsExtensions?: boolean;
     allowJs?: boolean;
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 51871749158..397c949410b 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -6628,11 +6628,6 @@ export function sourceFileMayBeEmitted(sourceFile: SourceFile, host: SourceFileM
     return true;
 }
 
-/**@internal */
-export function tsFixRootDirSignal(kind: string, rootDir: string, rootDir60: string): void {
-    throw new Error(`TS_FIX_ROOTDIR_SIGNAL:: ${kind}:: 5.9:: ${rootDir} 6.0:: ${rootDir60} <End>`);
-}
-
 /** @internal */
 export function sourceFileMayBeEmitted60(sourceFile: SourceFile, host: SourceFileMayBeEmittedHost, forceDtsEmit?: boolean): boolean {
     const options = host.getCompilerOptions();