From 95d6b0aca55a6068ccd7bd9f9db6385446b481f5 Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@klayout.de>
Date: Thu, 19 Feb 2026 22:34:10 +0100
Subject: [PATCH] Fixing a potential segfault during drawing

This patch moves a lock inside the thread finishing
code such that a race condition of the finish sequence
and a random restart of the threads becomes impossible.
This problem has been observed while randomly zooming
with multiple drawing threads present. It's hard to
reproduce.
---
 src/tl/tl/tlThreadedWorkers.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/tl/tl/tlThreadedWorkers.cc b/src/tl/tl/tlThreadedWorkers.cc
index 089b57873..13c26230a 100644
--- a/src/tl/tl/tlThreadedWorkers.cc
+++ b/src/tl/tl/tlThreadedWorkers.cc
@@ -412,9 +412,9 @@ JobBase::stop ()
   m_stopping = false;
   m_running = false;
 
-  m_lock.unlock ();
-
   stopped ();
+
+  m_lock.unlock ();
 }
 
 void