tonic-health fails to build when RUSTFLAGS="-Cpanic=abort"

[BenChand]

Bug Report

Version

tonic-health v0.2.0
└── tonic-build v0.3.1

Platform

Linux ben-XPS-13-9380 5.4.0-52-generic #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Crates

tonic-health="0.2"

Description

1. Clone this repository

2. export RUSTFLAGS="-Cpanic=abort"

3. cd tonic-health

4. cargo build

Cargo build fails and results in the following error:

error: failed to run custom build command for `tonic-health v0.2.0 (/home/ben/tonic/tonic-health)`

Caused by:
  process didn't exit successfully: `/home/ben/tonic/target/debug/build/tonic-health-667a60089c432488/build-script-build` (signal: 6, SIGABRT: process abort signal)

The requirement for using the -Cpanic=abort flag is for code coverage. See https://github.com/mozilla/grcov. To get the correct coverage level, we need to compile our project with this flag, but tonic-health prevents this.

[AndiDog]

How did you solve it? I'm seeing this with tonic-build 0.3.1 with prost 0.6.1 and my build.rs aborts. Usage of -Cpanic=abort is also for grcov. I tried running cargo build first and then overriding the flags while running the tests via grcov, but that doesn't work.

[BenChand]

@AndiDog I didn't manage to solve it, I moved to the rust nightly feature for code coverage:

rust-lang/rust#34701