gpapi build fails on resolver version 2

[jedenastka]

gpapi build fails on resolver version 2, which is the default for the 2021 edition of Rust.

How to reproduce

1. Create a simple project with cargo new
2. Add the 5.0.0 version (latest as of now) of gpapi as a dependency with cargo add [email protected]
3. Check the build with cargo check

Expected result

The build check finishes with no errors.

Actual result

Compilation fails. Error output: check.log

Details

Building the library itself succeeds, as the resolver version 1 is the default for workspaces, due to backwards compatibility, and this repository uses a workspace. More information about the new resolver is here: https://doc.rust-lang.org/edition-guide/rust-2021/default-cargo-resolver.html.

For now, the issue can be worked around by including package.resolver = "1" in Cargo.toml.