From 8998024aa388b1d15992133b98fadba1047e4bfe Mon Sep 17 00:00:00 2001
From: czzrr <chriz@live.dk>
Date: Fri, 19 Aug 2022 22:14:36 +0200
Subject: [PATCH] Correct test-args to compiletest on Windows

---
 src/bootstrap/test.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index baad0c75295a5..c759d9b88e2ff 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1514,7 +1514,15 @@ note: if you're sure you want to do this, please open an issue as to why. In the
 
         test_args.append(&mut builder.config.cmd.test_args());
 
-        cmd.args(&test_args);
+        // On Windows, replace forward slashes in test-args by backslashes
+        // so the correct filters are passed to libtest
+        if cfg!(windows) {
+            let test_args_win: Vec<String> =
+                test_args.iter().map(|s| s.replace("/", "\\")).collect();
+            cmd.args(&test_args_win);
+        } else {
+            cmd.args(&test_args);
+        }
 
         if builder.is_verbose() {
             cmd.arg("--verbose");