`#![no_main]` & empty `main fn` makes test run fail unconditionally

[Wyvern]

#![no_main]

#[no_mangle]
unsafe extern "C" fn main(){ /*dbg!();*/  }

#[test]
fn test(){} 

error: test failed, to rerun pass `--lib`

Caused by:
  process didn't exit successfully:

https://play.rust-lang.org/?version=nightly&mode=release&edition=2021&gist=7cf70fdc5b46dde52751bdd3a0f89a57

If add some code to main fn, such as dbg!();; then test can run normally without problem.

[RodBurman]

Compiling the slightly different (wrap nomangle in unsafe) code:

#![no_main]

#[unsafe(no_mangle)]
unsafe extern "C" fn main(){ /*dbg!();*/  }

#[test]
fn test(){}

with cargo version:

cargo -v -V
cargo 1.85.1 (d73d2caf9 2024-12-31)
release: 1.85.1
commit-hash: d73d2caf9e41a39daf2a8d6ce60ec80bf354d2a7
commit-date: 2024-12-31
host: aarch64-apple-darwin
libgit2: 1.8.1 (sys:0.19.0 vendored)
libcurl: 8.7.1 (sys:0.4.74+curl-8.9.0 system ssl:(SecureTransport) LibreSSL/3.3.6)
ssl: OpenSSL 1.1.1w  11 Sep 2023

produces an excutable that runs successfully, so it appears this issue is fixed.