Clean up Ractor cache after fork

Ractors created in a parent process should be properly shut down in the
child process.  They need their cache cleared and status set to
"terminated"

Co-authored-by: John Hawthorn <john@hawthorn.email>

1 files changed, 3 insertions, 0 deletions

diff --git a/thread.c b/thread.c
index d09767cb75..e56545e1c0 100644
--- a/thread.c
+++ b/thread.c
@@ -4740,6 +4740,9 @@ rb_thread_atfork_internal(rb_thread_t *th, void (*atfork)(rb_thread_t *, const r
 
     // OK. Only this thread accesses:
     ccan_list_for_each(&vm->ractor.set, r, vmlr_node) {
+        if (r != vm->ractor.main_ractor) {
+            rb_ractor_terminate_atfork(vm, r);
+        }
         ccan_list_for_each(&r->threads.set, i, lt_node) {
             atfork(i, th);
         }