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Re: 4 week-old pretest bugs

From: Jan Djärv
Subject: Re: 4 week-old pretest bugs
Date: Sat, 13 Jan 2007 12:11:53 +0100
User-agent: Thunderbird (Macintosh/20061207)

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.

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