From b391ebabbe8e92c19ad5b7c5ec7fa0a10aabb8a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Fri, 27 Jan 2017 22:50:57 +0100
Subject: [PATCH] Add more specific assertion for SpinLock initialization.

---
 source/vibe/core/sync.d | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/vibe/core/sync.d b/source/vibe/core/sync.d
index aaec4f1..faa09a0 100644
--- a/source/vibe/core/sync.d
+++ b/source/vibe/core/sync.d
@@ -1023,6 +1023,7 @@ package struct SpinLock {
 
 	bool tryLock()
 	@trusted {
+		assert(threadID != 0, "SpinLock.setup() was not called.");
 		assert(atomicLoad(locked) != threadID, "Recursive lock attempt.");
 		return cas(&locked, 0, threadID);
 	}