From 2b294f0b43167104371705fc2092b54448b92b5f Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 30 Apr 2015 21:15:35 +0200
Subject: add a sanity check

---
 libs/pbd/system_exec.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/pbd/system_exec.cc b/libs/pbd/system_exec.cc
index 60e73badfc..721db98a7e 100644
--- a/libs/pbd/system_exec.cc
+++ b/libs/pbd/system_exec.cc
@@ -671,6 +671,7 @@ SystemExec::terminate ()
 	wait();
 	if (thread_active) pthread_join(thread_id_tt, NULL);
 	thread_active = false;
+	assert(pid == 0);
 	::pthread_mutex_unlock(&write_lock);
 }
 
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