cargo test --doc not load same shared libraries as cargo test --lib

[adamcrume]

Problem
cargo test --doc doesn't appear to be loading the same shared libraries as cargo test --lib in 1.45

Steps

1. Clone https://github.com/tensorflow/rust
2. Set Rust to 1.44
3. Note that both cargo test --doc and cargo test --lib pass
4. Set Rust to 1.45
5. Note that cargo test --lib passes but cargo test --doc fails with error while loading shared libraries: libtensorflow.so.1: cannot open shared object file: No such file or directory

Notes

Output of cargo version:
cargo 1.44.0 (05d080f 2020-05-06) or cargo 1.45.0 (744bd1f 2020-06-15)

Running on Ubuntu 20.04 LTS.

[thoren-d]

For what it's worth, I'm seeing the same issue running doctests against my library that uses SDL2 (https://github.com/Rust-SDL2/rust-sdl2). cargo +1.44.0 test --doc works.

[raskr]

Same problem with any OS + rust1.48+, but not with rust1.42.
cargo test --doc with shared lib seems to be broken.

[adamcrume]

Using git bisect, I narrowed down to 3fd2814 being the breaking commit.

[pipehappy1]

This is still broken on 1.58

[Trolldemorted]

This issue is known for almost 3 years, could you give us a timeline when a fix will come? Not knowing about this I just wasted hours trying to find out why my doc tests fail :(