Set `cfp` to null (along with vm_stack) in `rb_fiber_close`.

1 files changed, 1 insertions, 0 deletions

diff --git a/cont.c b/cont.c
index 0c8a68fe9a..c0f9c1c720 100644
--- a/cont.c
+++ b/cont.c
@@ -1794,6 +1794,7 @@ rb_fiber_close(rb_fiber_t *fib)
     }
 
     rb_ec_set_vm_stack(ec, NULL, 0);
+    ec->cfp = NULL;
 
 #if !FIBER_USE_NATIVE
     /* should not mark machine stack any more */