failed to get bitcode from object file for LTO (Bitcode section not found in object file)

[matthiaskrgr]

git clone https://github.com/rust-lang/rust-clippy
cd rust-clippy
git checkout 9e605ef80f05fbaec22677e633971096675f2650
echo "[profile.release]
codegen-units = 1
lto = true" >> Cargo.toml

cargo test --release

fails to build without any interesting details unfortunately

.....
   Compiling clippy v0.1.60 (/home/matthias/vcs/github/rust-clippy)
error: failed to get bitcode from object file for LTO (Bitcode section not found in object file)

error: could not compile `clippy` due to previous error
warning: build failed, waiting for other jobs to finish...

with nightly-2022-02-10

Seems to happen while compiling tests:
Building [=======================> ] 140/141: compile-test(test)

[ehuss]

I believe this is because the compiler rlib libraries do not include bitcode in them. The compile-test.rs test depends on them, so it is not possible to build that test with LTO.

It would be nice if the error message included which file was missing the information (which would be easy to add here).

[aliciawyy]

Hello, I have the same problem. How should we fix it?

[tseli0s]

Same problem here when using lto.
EDIT: Seems like it was a dependency problem, removing a few dependencies (Not sure which ones but I can search git history) solved it.

[virusdefender]

I have the same problem when running cargo test --release, and it seems only fails in my linux builder only, works in my Mac

[zamazan4ik]

Met the same problem for ppc64le target in Maturin: PyO3/maturin#2337