https://git.ruby-lang.org/ruby.git/commit/?id=f73135233b

From f73135233b1437eb2cc6a5c8c732adca1dbd41f2 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@o...>
Date: Sun, 8 Nov 2020 16:14:43 +1300
Subject: Don't try to resume blocked fiber on dead thread.


diff --git a/thread_sync.c b/thread_sync.c
index 753b65e..ef8cb5b 100644
--- a/thread_sync.c
+++ b/thread_sync.c
@@ -29,15 +29,15 @@ sync_wakeup(struct list_head *head, long max) https://github.com/ruby/ruby/blob/trunk/thread_sync.c#L29
     list_for_each_safe(head, cur, next, node) {
         list_del_init(&cur->node);
 
-        if (cur->th->scheduler != Qnil) {
-            rb_scheduler_unblock(cur->th->scheduler, cur->self, rb_fiberptr_self(cur->fiber));
-        }
-
         if (cur->th->status != THREAD_KILLED) {
-            if (cur->th->scheduler == Qnil) {
+            
+            if (cur->th->scheduler != Qnil) {
+                rb_scheduler_unblock(cur->th->scheduler, cur->self, rb_fiberptr_self(cur->fiber));
+            } else {
                 rb_threadptr_interrupt(cur->th);
                 cur->th->status = THREAD_RUNNABLE;
             }
+
             if (--max == 0) return;
         }
     }
-- 
cgit v0.10.2


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