mark thread name string

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50869 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm.c b/vm.c
index 2b6a917bbc..006b0f8a80 100644
--- a/vm.c
+++ b/vm.c
@@ -2126,6 +2126,8 @@ rb_thread_mark(void *ptr)
 				 sizeof(th->machine.regs) / sizeof(VALUE));
 	}
 
+	RUBY_MARK_UNLESS_NULL(th->name);
+
 	rb_vm_trace_mark_event_hooks(&th->event_hooks);
     }