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Add VM_ASSERT on fiber->blocking == 0. (#7926)

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I have not seen any problems with this code, but this ensures the invariant.
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Samuel Williams 2023-06-10 23:13:01 +09:00 • committed by GitHub
parent a41e088604
commit be86767eef
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Notes: git 2023-06-10 14:13:21 +00:00 
Merged-By: ioquatix <samuel@codeotaku.com>
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cont.c
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@ -2810,6 +2810,8 @@ fiber_blocking_yield(VALUE fiber_value)
rb_fiber_t *fiber = fiber_ptr(fiber_value);
rb_thread_t * volatile th = fiber->cont.saved_ec.thread_ptr;
VM_ASSERT(fiber->blocking == 0);
// fiber->blocking is `unsigned int : 1`, so we use it as a boolean:
fiber->blocking = 1;