Upgrade failed; error message not helpful, error code incorrect

[stepancheg]

Problem you are trying to solve

$ rustup upgrade
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: latest update on 2025-01-09, rust version 1.84.0 (9fc6b4312 2025-01-07)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: removing previous version of component 'cargo'
info: rolling back changes
error: could not rename component file from '/root/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/etc/bash_completion.d' to '/root/.rustup/tmp/_5gb26t_5aka0pr1_dir/bk'
info: checking for self-update

  stable-x86_64-unknown-linux-gnu update failed - rustc 1.74.0 (79e9716c9 2023-11-13)

info: cleaning up downloads & tmp directories

Also

$ echo $?
0

So

• Error message should say, why it could not rename. Directory not found? Permission denied? Out of disk space?
• Upgrade failed, exit code should be not zero

Solution you'd like

• Amend error message with the reason why it failed
• Exit code not zero

Notes

$ rustup --version
rustup 1.27.1 (54dd3d00f 2024-04-24)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.74.0 (79e9716c9 2023-11-13)`

[rami3l]

@stepancheg Thanks for your report! The exit code part is a duplicate of #3476; I'm not sure about the error part, but my guess for the moment would be that this will be related to #988. Would you mind removing the toolchain to be upgraded and install it again, instead of performing a direct upgrade, as a workaround?

[stepancheg]

Uninstalling the toolchain and installing again works. Thank you!