https://issues.dlang.org/show_bug.cgi?id=18026
--- Comment #3 from JR <zor...@gmail.com> --- I reduced it to 58 lines using dustmite, which is incidentally amazing. Under 2.079.0, it compiles in -debug mode but doesn't outside of it. 2.078.3 can however compile it in both. The code is nonsense, but it appears to trigger the behaviour. > $ git clone https://github.com/zorael/kameloso -b 2.079-overflow > $ cd kameloso > $ dub build -b debug # works > > $ dub build -b plain > /usr/bin/dmd failed with exit code -11. > > $ gdb --batch -ex "run" --args dmd source/kameloso/*.d > source/kameloso/plugins/*.d > Program received signal SIGSEGV, Segmentation fault. > 0x0000555555825982 in TemplateInstance::needsCodegen() () I tested it on Travis and CircleCI. Both run 2.079.0, and Travis could not reproduce the segfault. CircleCI however could! Please see https://circleci.com/gh/zorael/kameloso/151. Again, this seems to only affect 2.079.0, and only on *some* distributions. Unless your linux installation sees the behaviour, I imagine the only way to observe it is to download a Manjaro .iso and run it in a virtual machine. Apologies. I wish I could produce something more tangible but this is how ephemeral the issue is. --