Re: crashing socket tests

Hi Vladimir,

> Besides this I observe weird behaviour with amd64 builds on linux - both
> single and multithreaded: without libffcall there is consistent segfault on
> sockets tests while with libffcall enabled everything works fine. Will
> investigate this further but any clue will be helpful.

I also observed segfaults on or soon after socket tests in various
configurations in February 2017. It seemed to depend on alignment options,
but tracking down this route it behaved like a Heisenbug.

A build with GC debugging enabled did not help.

I think to resolve this we need one of the following approaches:
  - Comment out some tests (the socket tests especially) and see if the
    testsuite still crashes occasionally.
  - Review the code of socket.d for ANY kind of mistake (usual GC-safety
    mistakes are not likely - see testing I mentioned above).
  - New kinds of debugging tools, in the spirit of GCC's "sanitizers" or
    valgrind.

Bruno


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