Try normalizing away some windows paths

Author: oli-obk

tests/compile-test.rs

@@ -55,6 +55,9 @@ fn base_config(test_dir: &str) -> compiletest::Config {
     config.args.push("-Aunused".into());
     config.args.push("-Zui-testing".into());
 
+    // Normalize away slashes in windows paths.
+    config.stderr_filter(r#"\\(.*)\.rs"#, "/$1.rs");
+
     config.root_dir = Path::new("tests").join(test_dir);
     //config.build_base = profile_path.join("test").join(test_dir);
     config.program = profile_path.join(if cfg!(windows) {
@@ -106,7 +109,8 @@ fn run_ui_toml() {
             .parent()
             .unwrap()
             .display()
-            .to_string(),
+            .to_string()
+            .replace('\\', "/"),
         "$$DIR",
     );