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Error if submodule fetch fails. In CI, if fetching a submodule fails, the script would exit successfully. Later parts of the build will fail due to the missing files, but it is a bit confusing, and I think it would be better to error out earlier. The reason is that in bash, `wait` without arguments will exit 0 even if a background job exits with an error. The solution here is to wait on each individual job, which will return the exit code of the job. This was encountered in #92177.
This directory contains the source code of the rust project, including:
- The test suite
- The bootstrapping build system
- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.