Rustdoc freezes then runs out of memory with #[derive(RustcEncodable)]

[tomaka]

Cargo.toml:

[dependencies]
rustc-serialize = "*"

Lib.rs:

/// ```
/// extern crate rustc_serialize;
///
/// #[derive(RustcEncodable)]
/// struct MyStruct {
///     field1: String,
///     field2: i32,
/// }
///
/// ```
pub fn foo() { }

On Windows if you run cargo test, rustdoc will freeze for about 2 minutes then crash because it ran out of memory. Didn't try Linux.

Removing #[derive(RustcEncodable)] fixes the problem.

Version: nightly from 2016-09-28.

[TimNN]

Earlier nightlies give the error:

    error[E0433]: failed to resolve. Did you mean `self::rustc_serialize`?
 --> <anon>:4:10
  |
4 | #[derive(RustcEncodable)]
  |          ^^^^^^^^^^^^^^ Did you mean `self::rustc_serialize`?

I already commented a bunch in #36881 (which is a duplicate of this issue), so I'm gonna close this in favour of that one.