Re: graphviz: dot on mipsel fails with emit.c:3873: bezier_bb: Assertion `bz.size > 0' failed

Aurelien Jarno <[email protected]> Tue, 10 Nov 2015 23:19:57 +0100

Newsgroups	gmane.linux.debian.ports.mips
Message-ID	<[email protected]>

On 2015-11-09 11:38, James Cowgill wrote:
> Control: notfound -1 2.38.0-10
> Control: found -1 2.38.0-11
> 
> Hi,
> 
> On Sat, 2015-11-07 at 03:52 +0100, Johannes Schauer wrote:
> > Package: graphviz
> > Version: 2.38.0-10
> > Severity: important
> > Control: block 804296 by -1
> > 
> > Hi,
> > 
> > I ran into this problem when building my package botch on mipsel:
> [...]
> > The problem can be trigged by the most minimal input:
> > 
> > 	> $ echo -ne 'digraph G {A -> B}' | dot
> > 	> dot: emit.c:3873: bezier_bb: Assertion `bz.size > 0' failed.
> > 	Aborted
> 
> I can reproduce this using graphviz 2.38.0-11, but not 2.38.0-10.
> 
> The most obvious difference between them is that -11 is compiled with
> gcc-5 and -10 is not. That could be related (I havn't done much
> investigation so far)?

Yes, this is due to gcc-5 and compiling emit.c with -fno-ipa-sra
workarounds the problem. This is therefore likely the same issue than
bug #804536 / upstream bug PR68273, though I haven't analyzed the
generated code in details.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
[email protected]                 http://www.aurel32.net

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