error: could not rename component file from

ref: https://github.com/rust-lang/rustup/issues/2729

This happens if the component file gets corrupted. The easiest fix is to uninstall and reinstall the toolchain.

1
    3  rustup toolchain uninstall stable-aarch64-unknown-linux-gnu
2
    4  rustup toolchain install stable-aarch64-unknown-linux-gnu

verified in arm linux docker.