Rustc fails to compile project with PGO

I tried to optimize the Zen project (source code details are below) with PGO with cargo-pgo.

I expected to see this happen:

The project compiles with instrumentation PGO successfully.

Instead, this happened:

During the compilation, I get the following error: https://gist.github.com/zamazan4ik/176517dd1d5bb7dc07c92e13016dfd8d . Switching C/C++ compilers or using nightly instead of stable does not help - the error remains the same.

In https://github.com/Kobzol/cargo-pgo/issues/44 was found that the error remains if we use raw Rustc compiler with proper PGO flags instead of cargo-pgo.

Meta

rustc --version --verbose:

rustc 1.75.0 (82e1608df 2023-12-21)
binary: rustc
commit-hash: 82e1608dfa6e0b5569232559e3d385fea5a93112
commit-date: 2023-12-21
host: x86_64-unknown-linux-gnu
release: 1.75.0
LLVM version: 17.0.6

rustc +nightly --version --verbose:

rustc 1.77.0-nightly (a2d9d73e6 2024-01-10)
binary: rustc
commit-hash: a2d9d73e608f1b24eba840c4fd2d68dbe3b65e01
commit-date: 2024-01-10
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Zen version: master branch, 6bd9c0138c6c514246f7dfe9ec389f97f42eeed6 commit. Project repo: https://github.com/gorules/zen

If you need additional information about the ticket - feel free to ping me, I will try my best to help with resolving the issue.

Start by reproducing the failure using rustc with the PGO flags described in the cargo-pgo issue and compare stable with nightly. Inspect the linked error gist and the Zen commit details; done means identifying the compiler failure and making the project compile successfully with instrumentation PGO.