vm_core.h: preserve thread ordering

I'm hesitant to consider this as spec, but this causes a
user-visible change which could break user code.

* vm_core.h (rb_vm_living_threads_insert): preserve order
  [Bug #10660] [ruby-core:67154] [ruby-core:67159]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49036 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 93163098e2..809da4e86f 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -975,7 +975,7 @@ rb_vm_living_threads_init(rb_vm_t *vm)
 static inline void
 rb_vm_living_threads_insert(rb_vm_t *vm, rb_thread_t *th)
 {
-    list_add(&vm->living_threads, &th->vmlt_node);
+    list_add_tail(&vm->living_threads, &th->vmlt_node);
     vm->living_thread_num++;
 }