Regression test for issue 24687.

src/test/auxiliary/issue24687_lib.rs

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+// 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.
+
+#![crate_type="lib"]
+
+// This is a file that pulls in a separate file as a submodule, where
+// that separate file has many multi-byte characters, to try to
+// encourage the compiler to trip on them.
+
+mod issue24687_mbcs_in_comments;
+
+pub use issue24687_mbcs_in_comments::D;
+

src/test/auxiliary/issue24687_mbcs_in_comments.rs

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+// 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.
+
+use std::fmt;
+
+// This ia file with many multi-byte characters, to try to encourage
+// the compiler to trip on them.  The Drop implementation below will
+// need to have its source location embedded into the debug info for
+// the output file.
+
+//                                                                       
+//                                                                       
+//                                                                       
+//                                                                       
+//                                                                       
+
+//                                                                       
+//                                                                       
+//                                                                       
+//                                                                       
+//                                                                       
+
+pub struct D<X:fmt::Debug>(pub X);
+
+impl<X:fmt::Debug> Drop for D<X> {
+    fn drop(&mut self) {
+        //                                                             
+        println!("Dropping D({:?})", self.0);
+    }
+}

src/test/run-pass/issue24687-embed-debuginfo.rs

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+// 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:issue24687_lib.rs
+
+extern crate issue24687_lib as d;
+
+fn main() {
+    // Create a d, which has a destructor whose body will be trans'ed
+    // into the generated code here, and thus the local debuginfo will
+    // need references into the original source locations from
+    // `importer` above.
+    let _d = d::D("Hi");
+}