1 files changed, 1 insertions, 2 deletions
diff --git a/vm.c b/vm.c
index c2dda3fdc4..4538c8b607 100644
--- a/vm.c
+++ b/vm.c
@@ -3138,8 +3138,7 @@ thread_mark(void *ptr)
     RUBY_MARK_UNLESS_NULL(th->top_wrapper);
     if (th->root_fiber) rb_fiber_mark_self(th->root_fiber);
 
-    /* Ensure EC stack objects are pinned */
-    rb_execution_context_mark(th->ec);
+    RUBY_ASSERT(th->ec == rb_fiberptr_get_ec(th->ec->fiber_ptr));
     RUBY_MARK_UNLESS_NULL(th->stat_insn_usage);
     RUBY_MARK_UNLESS_NULL(th->last_status);
     RUBY_MARK_UNLESS_NULL(th->locking_mutex);