Re: Crashing the new thread code

[Juliusz Chroboczek]

>> The following immediately crashes Emacs:
>> 
>> (let ((thread (make-thread #'(lambda () (while t (thread-yield))))))
>>   (thread-signal thread 'error nil))

> What is the semantics of signaling a thread that yields?

I'm not sure, that's why I was experimenting.

> What did you expect to happen?

The thread queues the condition and continues spinning?

> Of course, Emacs shouldn't exit, but what should it do in this case?

The condition is queued forever?  On the one hand, conditions should
only be delivered in well-defined circumstances (or else unwind-protect
becomes unusable), on the other hand, I expect asynchronous signal
delivery to be reliable.

(Is the set of functions that deliver a condition is too restrictive?
I see no way to check for a queued condition without grabbing a lock.)

-- Juliusz