[Therion] WG: Therion crashes in shapes.h when generating 3D

[Michael]

Hello,
After tedious search through 100s of Scraps I have now isolated the one (SA9.th2) scrap which crashes Therion in
extern/poly2tri/sweep/../common/shapes.h
It's attached together with an excerpt of the survey data.
Admittingly, the walls are not drawn very well, but after fixing and completing the walls (not done in attached sample) it still
crashes Therion.
May this example be a test case for developers to improve Therion's robustness.
BTW, it also crashes older Therion releases.

Cheers,
Michael.

-----Ursprüngliche Nachricht-----
Von: Michael [mailto:knollesimage at t-online.de] 
Gesendet: Samstag, 4. November 2017 14:48
An: 'List for Therion users' <therion at speleo.sk>
Betreff: Therion crashes in shapes.h when generating 3D

Hello,
Seeking advice from Therion developers how to track down the cause of attached crash report, and apply possible workaround.
Only happens when generating 3D of any format.
Producing plans (pdf, kml) works.
I'm running Therion 5.4.1 on Windows 7.
The crash seems unrelated to the last scrap processed before the crash, because when I exclude that scrap, it crashes after approx.
the same time with a different one.

Any help appreciated,
Michael.
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