I was able to avoid the segfault on both by reducing the parallel jobs from 16(12) to 8(6). I suspect the massive parallelism is causing certain ebuilds to become unstable. That seems likely as well. I'm not sure why, but some ebuilds won't build in parallel at all.

Parallel build issues rarely ...

For what it's worth, I highly doubt that this has anything to do with compiler optimizations. I have also seen crashes of the Glasgow Haskell Compiler, the native code generator of which implements essentially no microarchitecture-specific optimizations. Moreover, I have seen segmentation faults of ...

Yea. I spoke too soon. I've reduced the frequency of it happening, but it is still happening. On to the next ideas.

One pattern I'm noticing is that now it seems to be happening with builds that use libtool. This may just be a correlation, but my most recent failures were gnutls (first time that's ...

What irritates me is that my chromium builds always segfaults with at least the last 2 lines being exactly the same (can't recall the other ones, should've written those down somewhere..)[/code]

In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/include/g++-v6/string:52:0,
from /usr ...

Yea. I spoke too soon. I've reduced the frequency of it happening, but it is still happening. On to the next ideas.

One pattern I'm noticing is that now it seems to be happening with builds that use libtool. This may just be a correlation, but my most recent failures were gnutls (first time that's ...

Just a quick update.

I switched to GCC-6.3.0 and the segfaults continued.

Then I switched from 4x8GB of CMK16GX4M2B3000C15 to 4x8GB of CMK16GX4M2B3200C16. The Segfaults became slightly less frequent (but this may just have been luck). Then I switched down to 2x8GB of CMK16GX4M2B3200C16 and OC'd it ...

I'm running a Ryzen 1700X with the ASRock Taichi and 32GB of RAM. I've tried GCC 4.9.4, 5.4.0, and 6.3.0 and I've seen some sporadic segmentation faults on all three. Also an up-to-date BIOS, Memtest returns no issues, and stress doesn't seem to cause issues. So far I haven't been able to isolate ...