The build here appears to fail with:

c++: fatal error: Killed signal terminated program cc1plus

I also see a handful of "Cannot allocate memory" messages in the build.

The build works for me locally. But I have lots of RAM. Maybe there are system-resource issues with CircleCI?

The build works for me locally. But I have lots of RAM. Maybe there are system-resource issues with CircleCI?

Yeah, this would be my guess. It looks like we're running make with -j35, which could result in a lot of files being compiled simultaneously:

Working directory: /home/circleci/repo/emsdk/emsdk/fastcomp-clang/tag-e1.38.30/build_tag-e1.38.30_64
Command '['cmake', '--build', '.', '--', '-j35']' returned non-zero exit status 2.
Installation failed!

Note that we don't normally compile the emsdk unless it's changed (best I can tell), so it's possible this has been a problem for a while but we just haven't noticed it yet.

Looking at the emscripten source, it appears that they have an EMCC_CORES setting which might keep this under control? Might be worth trying this:

https://github.com/emscripten-core/emscripten/blob/34ea2d91e87ee1d1fa589e08013cfcb2f59f030c/.circleci/config.yml#L10

(this is just a guess, I am not sure if this is the right setting to change)

Awesome, thank you @aseering! That seemed to fix it, the only tests that are now failing are the chrome tests, which were broken before. I'm going to go ahead and merge.

great, glad it worked!