From bb34bce4208c8a7b1e875a27b07e67dea0e7fe7a Mon Sep 17 00:00:00 2001
From: Andy <anhans@microsoft.com>
Date: Wed, 2 Aug 2017 12:40:39 -0700
Subject: [PATCH] Set a high stack trace limit in command-line and server
 scenarios (#17464)

---
 src/compiler/sys.ts  | 12 ++++++++++++
 src/compiler/tsc.ts  |  2 ++
 src/server/server.ts |  2 ++
 3 files changed, 16 insertions(+)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 9c6d4bb795d..89cfb074bff 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -4,6 +4,18 @@ declare function setTimeout(handler: (...args: any[]) => void, timeout: number):
 declare function clearTimeout(handle: any): void;
 
 namespace ts {
+    /**
+     * Set a high stack trace limit to provide more information in case of an error.
+     * Called for command-line and server use cases.
+     * Not called if TypeScript is used as a library.
+     */
+    /* @internal */
+    export function setStackTraceLimit() {
+        if ((Error as any).stackTraceLimit < 100) { // Also tests that we won't set the property if it doesn't exist.
+            (Error as any).stackTraceLimit = 100;
+        }
+    }
+
     export enum FileWatcherEventKind {
         Created,
         Changed,
diff --git a/src/compiler/tsc.ts b/src/compiler/tsc.ts
index 8cc2e5c5ef6..db25afe45b6 100644
--- a/src/compiler/tsc.ts
+++ b/src/compiler/tsc.ts
@@ -665,6 +665,8 @@ namespace ts {
     }
 }
 
+ts.setStackTraceLimit();
+
 if (ts.Debug.isDebugging) {
     ts.Debug.enableDebugInfo();
 }
diff --git a/src/server/server.ts b/src/server/server.ts
index 6600b63dcb1..b72cc2f5a81 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -757,6 +757,8 @@ namespace ts.server {
         validateLocaleAndSetLanguage(localeStr, sys);
     }
 
+    setStackTraceLimit();
+
     const typingSafeListLocation = findArgument(Arguments.TypingSafeListLocation);
     const npmLocation = findArgument(Arguments.NpmLocation);