Auto merge of #23593 - georgeroman:fix_panic_on_opening_directory, r=Manishearth

Fix panic on opening a directory

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

Continued from https://github.com/servo/servo/pull/23548

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components/net/fetch/methods.rs

@@ -613,6 +613,14 @@ fn scheme_fetch(
             }
             if let Ok(file_path) = url.to_file_path() {
                 if let Ok(file) = File::open(file_path.clone()) {
+                    if let Ok(metadata) = file.metadata() {
+                        if metadata.is_dir() {
+                            return Response::network_error(NetworkError::Internal(
+                                "Opening a directory is not supported".into(),
+                            ));
+                        }
+                    }
+
                     // Get range bounds (if any) and try to seek to the requested offset.
                     // If seeking fails, bail out with a NetworkError.
                     let file_size = match file.metadata() {

tests/wpt/metadata/webdriver/tests/get_current_url/get.py.ini

@@ -1,2 +1,7 @@
 [get.py]
-  disabled: for now
+  [test_no_browsing_context]
+    expected: ERROR
+
+  [test_get_current_url_nested_browsing_context]
+    expected: FAIL
+

tests/wpt/metadata/webdriver/tests/navigate_to/navigate.py.ini

@@ -1,2 +1,4 @@
 [navigate.py]
-  disabled: for now
+  [test_no_browsing_context]
+    expected: ERROR
+