[Gmsh] Segfault when Periodic Curve is defined

[Christophe Geuzaine]

> On 17 Oct 2018, at 12:00, Marek Wojciechowski <mwojc at p.lodz.pl> wrote:
> 
> Hi!
> 
> The below script causes segfault for gmsh-4.0.2 under Linux 64-bit. The 
> periodic definition is the cause. In earlier 3.x versions it worked fine...

Indeed, a bug was introduced in version 4, when the periodic transformation is not explicitly specified.

> The question is what is a general way to fix this?

With your current version you can specify the transformation.

You can also download the next automatic snapshot, which will fix the issue.

Thanks for the report,

Christophe

> 
> 
> Point(1) = {-0.5, -0.5, 0.0, 0.025};
> Point(2) = {0.5, -0.5, 0.0, 0.025};
> Point(3) = {0.5, 0.5, 0.0, 0.025};
> Point(4) = {-0.5, 0.5, 0.0, 0.025};
> Line(1) = {1, 2};
> Line(2) = {2, 3};
> Line(3) = {3, 4};
> Line(4) = {4, 1};
> Periodic Curve {3} = {-1};
> Periodic Curve {2} = {-4};
> Line Loop(1) = {1, 2, 3, 4};
> Plane Surface(1) = {1};
> Physical Point(1) = {1};
> Physical Point(2) = {1, 2, 3, 4};
> Physical Point(3) = {2};
> Physical Point(4) = {3};
> Physical Point(5) = {4};
> Physical Line(1) = {1};
> Physical Line(2) = {1, 2, 3, 4};
> Physical Line(3) = {2};
> Physical Line(4) = {3};
> Physical Line(5) = {4};
> Physical Surface(1) = {1};
> 
> 
> Regards,
> -- 
> Marek Wojciechowski 
> Katedra Geotechniki i Budowli Inżynierskich P.Ł. (K-66)
> Al. Politechniki 6
> 90-924 Łódź
> Telefon: +0048 42 6313590
> Fax: +0048 42 6313592
> 
> 
> 
> 
> --- 
> Politechnika Łódzka 
> Lodz University of Technology 
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

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