core_io

std::io with all the parts that don't work in core removed.

Adding new nightly versions

First, make sure the commit you want to add is fetch in the git tree at /your/rust/dir/.git. Then, import the right source files:

$ echo FULL_COMMIT_ID ...|GIT_DIR=/your/rust/dir/.git ./build-src.sh

Instead of echoing in the commit IDs, you might pipe in rustc-commit-db list-valid.

The build-src script will prompt you to create patches for new commits.