[Issue 19956] Subclassing Thread with synchronized (this) may deadlock

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19956

--- Comment #3 from anonymous4 <dfj1esp02 at sneakemail.com> ---
Try to lock a dedicated mutex in BadThread instead of this and see if there's a
deadlock.

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