If the GC runs before the Mutex's are initialised then we get a crash in pthread_mutex_lock.

It is possible for GC to run during initialisation due to objects being allocated

1 files changed, 1 insertions, 0 deletions

diff --git a/inits.c b/inits.c
index a3eec164bb..f8eba911d5 100644
--- a/inits.c
+++ b/inits.c
@@ -20,6 +20,7 @@ static void Init_builtin_prelude(void);
 void
 rb_call_inits(void)
 {
+    CALL(Thread_Mutex);
 #if USE_TRANSIENT_HEAP
     CALL(TransientHeap);
 #endif