Re: 4 week-old pretest bugs

[Jan Djärv]

Stefan Monnier skrev:
> > it before incrementing interrupt_input_blocked in the #define for
> > BLOCK_INPUT fixes the bug!
>
> Are you sure it fixes it?  It may just hide it by slightly changing
> the timing.

The bug occurs because revoke_input_signal is called when it should not be. 
Somehow the counter used by UNBLOCK/BLOCK_INPUT gets the wrong value, becoming 
negative.

By using sigblock/sigunblock we make sure that counter isn't touched, so it 
fixes this particular case.  However, why the counter gets the wrong value is 
still not known.

        Jan D.