fix(URL): Add missing part assignment (#7239)

2 files changed, 3 insertions, 0 deletions

diff --git a/cli/rt/11_url.js b/cli/rt/11_url.js
index 7e01f4d88..5de6cc8c7 100644
--- a/cli/rt/11_url.js
+++ b/cli/rt/11_url.js
@@ -339,6 +339,7 @@
         }
         usedNonBase = true;
       } else {
+        parts.slashes = baseParts.slashes;
         parts.username = baseParts.username;
         parts.password = baseParts.password;
         parts.hostname = baseParts.hostname;
diff --git a/cli/tests/unit/url_test.ts b/cli/tests/unit/url_test.ts
index e71f07036..bf367df76 100644
--- a/cli/tests/unit/url_test.ts
+++ b/cli/tests/unit/url_test.ts
@@ -342,6 +342,8 @@ unitTest(function urlBase(): void {
   assertEquals(new URL("efgh:", "http://foo/a/b?c#d").href, "efgh:");
   assertEquals(new URL("efgh:", "file://foo/a/b?c#d").href, "efgh:");
   assertEquals(new URL("efgh:", "abcd://foo/a/b?c#d").href, "efgh:");
+
+  assertEquals(new URL("/foo", "abcd:/").href, "abcd:/foo");
 });
 
 unitTest(function urlDriveLetterBase() {