Cargo test skipping doc tests

[vorner]

For some time (a week, maybe?) I see a strange failure (or lack of) of doctests. How to reproduce:

• cargo new broken
• Put this content into the src/lib.rs

//! ```rust
//! broken test
//! ```

When I run cargo +nightl test, I get this output (eg. no statistics of how many doc tests were run and no failure):

$ cargo test
    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running target/debug/deps/broken-df6cff22daace888

running 0 tests

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

   Doc-tests broken

When I run with +stable, I get proper test failure and statistics.

The nightly is:

rustc 1.22.0-nightly (ca94c75c5 2017-09-10)
binary: rustc
commit-hash: ca94c75c527006be0824c764773380bbeea6030b
commit-date: 2017-09-10
host: x86_64-unknown-linux-gnu
release: 1.22.0-nightly
LLVM version: 4.0

When searching through the issues, I met only this #44237 issue, but I don't think it is the same problem.

I'm a bit surprised nobody reported this before me, is it possible it is some kind of local problem? But I can't come up with an idea what that could be or what to check for.

[ollie27]

Try updating your nightly version. I'm guessing this is a dupe of #44487.

[vorner]

Silly me, yes, you're right. I tricked myself by having a script that does not upgrade the nightly compiler if it can't compile current clippy ‒ so I believed I had the newest and I did not. After upgrading it indeed works.

So, my apologies for a useless report.