Failure to build doc-tests when combining panic=abort, panic-abort-tests and build-std

[Nemo157]

I tried this code:

//! ```should_panic
//! panic!();
//! ```

> cargo test --doc -Zbuild-std -Zpanic-abort-tests --config=profile.dev.panic='"abort"' --target=x86_64-unknown-linux-gnu

I expected to see this happen: successful test run using panic_abort

Instead, this happened:

---- src/lib.rs - (line 1) stdout ----
error: the crate `panic_unwind` does not have the panic strategy `unwind`

error: aborting due to 1 previous error

Couldn't compile the test.

There seems to be a couple of issues here, the panic=abort doesn't seem to be applied to rustdoc, so it still uses the panic_unwind runtime, and for some reason that runtime has been broken when -Cpanic=abort is active.

Meta

rustc --version --verbose:

rustc 1.77.0-nightly (098d4fd74 2024-01-16)
binary: rustc
commit-hash: 098d4fd74c078b12bfc2e9438a2a04bc18b393bc
commit-date: 2024-01-16
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

[Nemo157]

Manually telling rustdoc to use panic=abort gets the test to pass, so the second issue of having a broken panic-unwind might not actually matter, cargo just needs to be applying the -Zpanic-abort-tests changes to the doc-tests build too

RUSTDOCFLAGS='-Cpanic=abort --extern noprelude:panic_abort=/run/user/1000/cargo-home/target/shared/x86_64-unknown-linux-gnu/debug/deps/libpanic_abort-e6b0b85e7fbd4dec.rlib' cargo test --doc -Zbuild-std -Zpanic-abort-tests --config=profile.dev.panic='"abort"' --target=x86_64-unknown-linux-gnu