ICE: find_associated_type_in_generics(): didn't find associated type anywhere in the generics list

[tikue]

Possibly a dup of #17359. Minimal example to reproduce in play.rust-lang.org as of 10/2/2013:

#![feature(associated_types)]
trait Person {
    type string;
}

struct Someone<P: Person>;

fn main() {
}

<anon>:6:19: 6:25 error: internal compiler error: find_associated_type_in_generics(): didn't find associated type anywhere in the generics list
<anon>:6 struct Someone<P: Person>;
                           ^~~~~~

[erickt]

cc-ing @aturon. Another variation of this bug:

#![feature(associated_types)]

trait Deserialize {
    type Visitor;
}

trait Deserializer {
    fn deserialize<D: Deserialize>();
}

fn main() { }

produces:

foo.rs:8:23: 8:34 error: internal compiler error: find_associated_type_in_generics(): didn't find associated type anywhere in the generics list
foo.rs:8     fn deserialize<D: Deserialize>();
                               ^~~~~~~~~~~
note: the compiler hit an unexpected failure path. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' failed at 'Box<Any>', /Users/rustbuild/src/rust-buildbot/slave/nightly-mac/build/src/libsyntax/diagnostic.rs:113

[aturon]

cc @pcwalton

[nikomatsakis]

Symptom of #18768

[retep998]

Yet another variation

#![feature(associated_types)]
trait Bindable {
    type Ret;
}
trait Foo<A> where A: Bindable {
    fn func<B>(b: B) -> <A as Bindable>::Ret;
}
fn main() {}

<anon>:5:23: 5:31 error: internal compiler error: find_associated_type_in_generics(): didn't find associated type anywhere in the generics list
<anon>:5 trait Foo<A> where A: Bindable {
                               ^~~~~~~~
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' panicked at 'Box<Any>', /build/rust-git/src/rust/src/libsyntax/diagnostic.rs:116