From 3bd448574bd1338c39cb4e411696224429ab1faf Mon Sep 17 00:00:00 2001
From: tom doron <tomer@apple.com>
Date: Mon, 13 Jun 2022 21:05:40 -0700
Subject: [PATCH] flush stderr after printing back traces

motivation: make sure stderr buffered is printed out before program exits

changes: explicitly call fflush after writing the backtraces
---
 Sources/Backtrace/Backtrace.swift | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Sources/Backtrace/Backtrace.swift b/Sources/Backtrace/Backtrace.swift
index 9d08f2e..1baaf08 100644
--- a/Sources/Backtrace/Backtrace.swift
+++ b/Sources/Backtrace/Backtrace.swift
@@ -64,6 +64,7 @@ private let errorCallback: CBacktraceErrorCallback? = {
 private func printBacktrace(signal: CInt) {
     _ = fputs("Received signal \(signal). Backtrace:\n", stderr)
     backtrace_full(state, /* skip */ 0, fullCallback, errorCallback, nil)
+    fflush(stderr)
 }
 
 public enum Backtrace {