build-std broken as of nightly 74c482104 (2023-05-04)

[krstn42]

rust-lang/rust#108865 added a "sysroot" dummy crate, which seems to have broken build-std, cf. rust-lang/rust#111225.

% cargo build
error: Package `test v0.0.0 ([…]/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/test)` does not have the feature `compiler-builtins-mem`

Mainly opening this issue in case anyone else happens to stumble upon it and thinks they are doing something wrong :-) I'm not completely sure if any changes may be necessary here or if this will be fixed in Rust/Cargo.

Switching to an older nightly version seems to be the best workaround for now.

rustup install nightly-2023-05-03
rustup override set nightly-2023-05-03

[weihanglo]

This should now be fixed in the latest nightly (2023-05-05).

[kingdevnl]

For me it's complaining about
error: Package `test v0.0.0 (/home/jasper/.rustup/toolchains/nightly-2023-05-05-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/test)` does not have the feature `backtrace`

[weihanglo]

Would branch were you in? Could you provide a cargo -vV output here? Thank you.

[kingdevnl]

Updating to nightly-05-06 worked