[llvm] [Support] Trim trailing null character in PrettyStackTraceFormat. (PR #77351)

[Jon Ross-Perkins via llvm-commits]

https://github.com/jonmeow updated https://github.com/llvm/llvm-project/pull/77351

>From 0c71d1fe9167a89af1603d6d30fc05078d2cc7bc Mon Sep 17 00:00:00 2001
From: jonmeow <jperkins at google.com>
Date: Mon, 8 Jan 2024 10:26:09 -0800
Subject: [PATCH] [Support] Trim trailing null character in
 PrettyStackTraceFormat.

---
 llvm/lib/Support/PrettyStackTrace.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Support/PrettyStackTrace.cpp b/llvm/lib/Support/PrettyStackTrace.cpp
index f9f1b8a419b8208..fc3e08e3662217b 100644
--- a/llvm/lib/Support/PrettyStackTrace.cpp
+++ b/llvm/lib/Support/PrettyStackTrace.cpp
@@ -249,6 +249,8 @@ PrettyStackTraceFormat::PrettyStackTraceFormat(const char *Format, ...) {
   va_start(AP, Format);
   vsnprintf(Str.data(), Size, Format, AP);
   va_end(AP);
+  // Remove the '\0' for printing.
+  Str.pop_back();
 }
 
 void PrettyStackTraceFormat::print(raw_ostream &OS) const { OS << Str << "\n"; }