- attachment data

build.rs

@@ -167,7 +167,7 @@ impl DeMangler {
                             return Err(Error::msg(format!(
                                 "conflicting mangled symbols for {} in {}: {}, {}",
                                 demangled,
-                                a_file.to_str().unwrap(),
+                                a_file.to_string_lossy(),
                                 existing_mangled,
                                 mangled
                             )));