Description
I'm not sure what changed in here, but a contributor to the book just discovered we have a doctest that passed with stable 1.31.0 and fails to compile with stable 1.32.0.
If I extract the code into a library and remove the rustdoc specific bits (the code hiding #s), it compiles successfully with both Rust 1.31.0 and Rust 1.32.0, so I suspect something with rustdoc to be the cause? I'm not entirely sure though.
I looked for recent PRs and issues and didn't find anything that looked relevant, other than uniform path stabilization, and I hope it's not that.
This is the one test from the book extracted for reproduction (but still within a markdown file as it is in the book because that seems important):
# Rustdoc Weirdness Example
Here is the doc test that passes with Rust 1.31.0 and fails with Rust 1.32.0:
```rust
//! # Art
//!
//! A library for modeling artistic concepts.
pub mod kinds {
/// The primary colors according to the RYB color model.
pub enum PrimaryColor {
Red,
Yellow,
Blue,
}
/// The secondary colors according to the RYB color model.
pub enum SecondaryColor {
Orange,
Green,
Purple,
}
}
pub mod utils {
use crate::kinds::*;
/// Combines two primary colors in equal amounts to create
/// a secondary color.
pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
// --snip--
# SecondaryColor::Orange
}
}
# fn main() {}
```
Weird, right???
To reproduce, put this text into something.md. If you use Rust 1.31.0 and run rustdoc --test something.md, it results in 1 test passing. If you use Rust 1.32.0 and run rustdoc --test something.md, it can't compile the test and results in these compiler errors:
---- src/ch14-02-publishing-to-crates-io.md - Rustdoc_Weirdness_Example (line 5) stdout ----
error[E0432]: unresolved import `crate::kinds`
--> src/ch14-02-publishing-to-crates-io.md:27:16
|
24 | use crate::kinds::*;
| ^^^^^ maybe a missing `extern crate kinds;`?
error[E0433]: failed to resolve: use of undeclared type or module `SecondaryColor`
--> src/ch14-02-publishing-to-crates-io.md:33:9
|
30 | SecondaryColor::Orange
| ^^^^^^^^^^^^^^ use of undeclared type or module `SecondaryColor`
error[E0412]: cannot find type `PrimaryColor` in this scope
--> src/ch14-02-publishing-to-crates-io.md:31:20
|
28 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
| ^^^^^^^^^^^^ not found in this scope
error[E0412]: cannot find type `PrimaryColor` in this scope
--> src/ch14-02-publishing-to-crates-io.md:31:38
|
28 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
| ^^^^^^^^^^^^ not found in this scope
error[E0412]: cannot find type `SecondaryColor` in this scope
--> src/ch14-02-publishing-to-crates-io.md:31:55
|
28 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
| ^^^^^^^^^^^^^^ not found in this scope
thread 'src/ch14-02-publishing-to-crates-io.md - Rustdoc_Weirdness_Example (line 5)' panicked at 'couldn't compile the test', src/librustdoc/test.rs:323:13