Fix rust-analyzer install when not available.#87007

Merged

bors merged 3 commits intorust-lang:masterfrom ehuss:fix-rust-analyzer-install

Jul 13, 2021

+19-6

Commits on Jul 9, 2021

Fix rust-analyzer install when not available.
ehuss
committed

Commits on Jul 11, 2021

Add comments why install steps should never fail.
ehuss
committed

Commits on Jul 12, 2021

Provide a better error when x.py install src/doc doesn't work.
ehuss
committed