Troubleshooting FAQ
I see a warning "Variable None
should have snake_case name, e.g. none
"
rust-analyzer fails to resolve None
, and thinks you are binding to a variable
named None
. That's usually a sign of a corrupted sysroot. Try removing and re-installing
it: rustup component remove rust-src
then rustup component install rust-src
.
Rust Analyzer and Cargo compete over the build lock
Rust Analyzer invokes Cargo in the background, and it can thus block manually executed
cargo
commands from making progress (or vice-versa). In some cases, this can also cause
unnecessary recompilations caused by cache thrashing. To avoid this, you can configure
Rust Analyzer to use a different target directory.
This will allow both the IDE and Cargo to make progress independently, at the cost of
increased disk space usage caused by the duplicated artifact directories.