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From: Simon Wright <simon.j.wright@mac.com>
Newsgroups: comp.lang.ada
Subject: Re: GNAT Spitbol segmentation fault
Date: Thu, 18 Jan 2007 22:31:10 +0000
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"Alex R. Mosteo" <devnull@mailinator.com> writes:

> Very rarely I get a Storage_Error and segment violation that kills
> the program. Running inside gdb I get this backtrace:
>
> #0  0xb7ddf37c in memcpy () from /lib/tls/i686/cmov/libc.so.6
> #1  0x081b7d8d in ada.strings.fixed.replace_slice ()
> #2  0x081bd6cf in ada.strings.unbounded.replace_slice ()
> #3  0x081d4f5e in gnat.spitbol.patterns.match ()
>
> Unfortunately, address2line doesn't make any valid source lines from
> these addresses, I suppose because the gdb wrapping (but this is
> just a guess).

For reasons I don't understand the GNAT runtime is compiled without
-g.

You could rebuild the RTL (there is a script to do so in the adalib
directory, I think -- yes, Makefile.adalib -- not always completely
straightforward to use IME but usually possible!).