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Created attachment 25815 [details]
Mono crashing in GC code. Please see the attachment for the stacktrace. Unfortunately, this issue is hard to reproduce, because this happens when our program processes bid dataset, about half of a terabyte. SIGSEGV happens when mono eats ~14GB RAM. We tried MONO_GC_PARAMS=max-heap-size=32G - same issue.
OS: Ubuntu 16.04.3 LTS (x64)
Mono version: 184.108.40.206
Vlad, the crash is at https://github.com/mono/mono/blob/2017-06/mono/utils/lock-free-alloc.c?utf8=%E2%9C%93#L147, do you think it's possible that `mono_valloc` or `mono_valloc_aligned` return NULL? What more information would you need to diagnose this bug?