Documentation tests don't move via #[cfg(test)]

[elichai]

Problem
Running cargo test doesn't do doc testing for documentation under #[cfg(test)]
Steps

///```rust
/// println!("test")
/// ```
extern "C" {}

#[cfg(test)]
mod A {
    ///```rust
    /// println!("test"
    /// ```
    extern "C" {}

    #[test]
    fn test() {
        println!("test")
    }
}

Output from cargo test:

running 1 test
test A::test ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

     Running target/debug/deps/test_cargo-81aed86b67506427

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

   Doc-tests test-cargo

running 1 test
test src/lib.rs -  (line 3) ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

``

As you can see the first doc test is ran, the test in `A` also runs but the doc tests in `A` doesn't run

**Notes**

Output of `cargo version`:
`cargo 1.34.0 (6789d8a0a 2019-04-01)`
`rustc 1.34.1 (fc50f328b 2019-04-24)`

[ehuss]

This just changed a few days ago (rust-lang/rust#59940). Can you try with the latest nightly and see if it behaves the way you want?

[elichai]

@ehuss Wow!, yes it seems that latest nightly solves this.
I'm sorry I missed it before.

(FYI Idk how the C-bug got there)

Thank you!

[ehuss]

Sure, no problem. The C-bug label is added by GitHub automatically based on which template you pick. I'll close this for now since it seems to be fixed.