From 82d6696c9d152c0e5c52a56ebb159ad9bbc8a870 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Dunglas?= <kevin@dunglas.fr>
Date: Wed, 11 Feb 2026 15:18:55 +0100
Subject: [PATCH] fix: race condition in thread shutdown during drain

---
 phpthread.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/phpthread.go b/phpthread.go
index 40d04eff..5ff15b64 100644
--- a/phpthread.go
+++ b/phpthread.go
@@ -66,9 +66,11 @@ func (thread *phpThread) boot() {
 // shutdown the underlying PHP thread
 func (thread *phpThread) shutdown() {
 	if !thread.state.RequestSafeStateChange(state.ShuttingDown) {
-		// already shutting down or done
+		// already shutting down or done, wait for the C thread to finish
+		thread.state.WaitFor(state.Done, state.Reserved)
 		return
 	}
+
 	close(thread.drainChan)
 	thread.state.WaitFor(state.Done)
 	thread.drainChan = make(chan struct{})