:(
unfortunately the snippets of output you pasted don't reveal much of the cause of failure. Any chance you can dig a bit further and find the real reason for the failure?
Maybe passing --verbose-build to the build-script might help.
Maybe you have already tried this but usually what helps for me is to make sure to run an update checkout and after that build with --clean to remove any outdated CMake and build files.
Maybe that can help :)
So I ran --verbose-build and I got multiple outputs with exit code 1 and 2. I have made a gist for the output I think is relevant in my case here:
https://gist.github.com/pushpinderpalsingh/0049d2953eb7b9fefe2b8dcef02e32d4
When you have time to look, let me know if you want to look at something particular and/or want me to do something else to debug this error.
Ya I am running --clean before every build.
I get what looks like the same failures when building on Linux with Ninja building with Xcode: CMark test failures on Linux · GitHub
See also [SR-13635] CMark Test fails · Issue #56070 · apple/swift · GitHub