Re: [isabelle] Isabelle2014-RC0 segfault / sledgehammer raises exception DUP

Hi Fabian, Christian,

> I noticed two problems, it could be that they are related but i don't know. Note that (especially the first one) might be related to the ML process crashing in thread [1].

Thanks for your reports. I will look more closely into them in the coming days. I actually ran into the second issue last Friday when demoing Sledgehammer to Daniel Matichuk but could not reproduce it afterward. I also experience the first issue once in a while, sometimes with Sledgehammer, sometimes without; it seems to be related to multithreading.

I will disable MaSh for now -- it is the likely source of both problems, and I would rather play safe with the coming release. It's a pity, since the tool really does help Sledgehammer, but I don't want to see reports like this one about Isabelle2014 final if it can be avoided.



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