From d39bfafee7e6a5211af4bd1d21cfc953b14ca734 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 4 Oct 2024 14:30:06 +0200
Subject: [PATCH] runtime: use stringslite.CutPrefix in isExportedRuntime

Change-Id: I7cbbe3b9a9f08ac98e3e76be7bda2f7df9c61fb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/617915
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---
 src/runtime/traceback.go | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/runtime/traceback.go b/src/runtime/traceback.go
index 95a57bd2b7..3c2092ed99 100644
--- a/src/runtime/traceback.go
+++ b/src/runtime/traceback.go
@@ -1149,11 +1149,10 @@ func showfuncinfo(sf srcFunc, firstFrame bool, calleeID abi.FuncID) bool {
 // It is only for runtime functions, so ASCII A-Z is fine.
 func isExportedRuntime(name string) bool {
 	// Check and remove package qualifier.
-	n := len("runtime.")
-	if len(name) <= n || name[:n] != "runtime." {
+	name, found := stringslite.CutPrefix(name, "runtime.")
+	if !found {
 		return false
 	}
-	name = name[n:]
 	rcvr := ""
 
 	// Extract receiver type, if any.
-- 
2.48.1