From fdf89edbfed8c803c76c540278d3d443f05b476a Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@mozilla.com>
Date: Thu, 7 Jun 2018 14:12:12 -0700
Subject: [PATCH] Fail loudly if a build.rs dependency path can't be printed.

---
 lib/codegen/build.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/codegen/build.rs b/lib/codegen/build.rs
index 7e58b0d012..d127f357b4 100644
--- a/lib/codegen/build.rs
+++ b/lib/codegen/build.rs
@@ -50,7 +50,7 @@ fn main() {
     // The `build.py` script prints out its own dependencies.
     println!(
         "cargo:rerun-if-changed={}",
-        crate_dir.join("build.rs").to_string_lossy()
+        crate_dir.join("build.rs").to_str().unwrap()
     );
 
     // Scripts are in `$crate_dir/meta`.