add test for issue 48414 ICE

Author: QuietMisdreavus

src/test/rustdoc/auxiliary/issue-48414.rs

@@ -0,0 +1,15 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+/// Woah, this trait links to [OtherTrait](OtherTrait)!
+pub trait SomeTrait {}
+
+/// Woah, this trait links to [SomeTrait](SomeTrait)!
+pub trait OtherTrait {}

src/test/rustdoc/issue-48414.rs

@@ -0,0 +1,21 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:issue-48414.rs
+
+// ICE when resolving paths for a trait that linked to another trait, when both were in an external
+// crate
+
+#![crate_name = "base"]
+
+extern crate issue_48414;
+
+#[doc(inline)]
+pub use issue_48414::{SomeTrait, OtherTrait};