[erlang-bugs] gcc bug triggered by compiling R14B02 (not an erlang bug per se)

Nico Kruber <>
Thu May 5 11:39:29 CEST 2011


On Thursday 28 April 2011 09:29:26 Mikael Pettersson wrote:
> Matthias Lang writes:
>  > Hi,
>  > 
>  > > I'm unable to reproduce this with either gcc-4.5.2 or
>  > > gcc-4.5-20110421, both vanilla unpatched FSF sources, on an x86-64
>  > > box running Fedora 13. Looks like a Debian bug to me.
>  > 
>  > Thanks, agree.
>  > 
>  > I glanced at Debian's patches, but they're 200k lines long. Did not
>  > feel like digging through that to try and understand what they've
>  > done. Feels like "report and forget" time.
>  > 
>  > Anything more than the rest of this mail I should send to Debian?
>  > 
>  > --------------------
>  > 
>  > gcc -v:  gcc version 4.5.2 (Debian 4.5.2-11)
> 
> This bit looks incomplete.  'gcc -v' normally includes a list of
> configuration options, that sometimes do matter.  Of course, Debian
> should know what "4.5.2-11" means exactly, so it may not matter.
> It would matter for bug reports to FSF GCC.
> 
> Apart from that, the bug report looks complete.
> 
>  > uname -a: Linux contorpis.corelatus.se 2.6.38-2-amd64 #1 SMP Thu Apr 7
>  > 04:28:07 UTC 2011 x86_64 GNU/Linux
>  > 
>  > how to reproduce:
>  >    cd /tmp
>  >    wget www.corelatus.se/~matthias/preprocessed.i
>  >    gcc -O3 -c preprocessed.i
>  > 
>  > here's what it looks like on my machine:
>  >   >   gcc -O3 -c preprocessed.i
>  >   
>  >   beam/dist.c: In function ‘erts_do_net_exits’:
>  >   beam/dist.c:501:1: internal compiler error: in dfs_enumerate_from, at
>  >   cfganal.c:1207 Please submit a full bug report,
>  >   with preprocessed source if appropriate.
>  >   See <file:///usr/share/doc/gcc-4.5/README.Bugs> for instructions.
>  > 
>  > MD5: 616c74a08f57cb9263a9af62d845fb19  preprocessed.i
>  > 
>  > Problem does not occur with "gcc version 4.4.5 (Debian 4.4.5-15)"
>  > 
>  > Can't find a similar problem at bugs.debian.org.
>  > Similar problem: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48000
>  > 
>  > Matt

This is not only a Debian problem. Happens on openSUSE Factory, too - but only on x86_64 - see
https://build.opensuse.org/package/rawlog?arch=x86_64&package=erlang&project=home%3Atschuett&repository=openSUSE_Factory

This error did not occur with R14B01 - but the GCC packages might have been different back then.
Does the error still occur with the GCC patch from the bug report you mentioned?

Nico
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