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bug#7952: 24.0.50; crash in find_interval


From: Andreas Schwab
Subject: bug#7952: 24.0.50; crash in find_interval
Date: Sat, 19 Mar 2011 13:14:48 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

> There's nothing in this code that modifies `tree' in any way.  (I even
> disassembled the code to make sure.)  So how come a non-NULL value
> becomes NULL here?

It isn't, otherwise you would get a crash.

> Since this value is passed in a register by the caller and kept in a
> register from the very beginning of the function, not even some
> missing GCPRO somewhere could explain this.  What am I missing?

Probably your toolchain is too old to be able to produce complete unwind
information.  Try setting a breakpoint at the abort line to get a better
picture.

Andreas.

-- 
Andreas Schwab, address@hidden
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