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Re: [22.1.90]: Point before start of properties

From: David Kastrup
Subject: Re: [22.1.90]: Point before start of properties
Date: Tue, 19 Feb 2008 18:31:34 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

"Marshall, Simon" <address@hidden> writes:

>> > Thanks for the suggestions and the careful reading of my report.  Is
>> > there anything else you think I could try, eg, to deal with the size
> of
>> > struct interval?  I can confirm that it is 28, though it is 28 with
> or
>> > without optimisation.  I tried padding it to 32 by adding a dummy
> int to
>> > it, but it still hit the breakpoint with optimisation.
>> Yes, as I said, the assertion failure is probably not a fluke, altough
>> the check itself is a bit fishy.
> OK, together with another suggestion, I rebuilt emacs with CFLAGS="-g
> -O1 -fno-unit-at-a-time -DENABLE_CHECKING".  This time I am able to get
> better debug info than before.

DEBUG tells you

** When you are trying to analyze failed assertions, it will be
essential to compile Emacs either completely without optimizations or
at least (when using GCC) with the -fno-crossjumping option.  Failure
to do so may make the compiler recycle the same abort call for all
assertions in a given function, rendering the stack backtrace useless
for identifying the specific failed assertion.

David Kastrup

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