cargo udeps does not work on stage0_bin crate

[tiziano88]

$ env --chdir=./stage0_bin cargo udeps
error: Package `test v0.0.0 (/nix/store/8y16j8ja4jpr61gxkq4mcqj5k94pk17z-rust-default-1.72.0-nightly-2023-07-03/lib/rustlib/src/rust/library/test)` does not have the feature `backtrace` 

It seems caused by the build-std config:

oak/stage0_bin/.cargo/config.toml

Line 9 in e5aadbe

build-std = ["core"]

(removing it makes it work again)

Possibly related to est31/cargo-udeps#153

[conradgrobler]

It also does not work on oak_restricted_kernel_wrapper either. I think it is because cargo udeps still checks the test-related dependencies even if the binary is marked as having no tests and not benches in the Cargo.toml file.