no idea why this is failing

⚠️ Potential issue | 🟠 Major

Consider improving error handling to match non-Windows behavior.

The Windows implementation returns an error if x509_cert_count is 0, regardless of whether store opening succeeded. The non-Windows code (lines 1512-1517) only returns an error if both x509_cert_count == 0 AND there were errors during loading.

The non-Windows approach is more resilient—it succeeds if any certificates loaded, even if some failed. Consider updating the Windows implementation to allow partial success and provide more specific error messages (e.g., "stores exist but are empty" vs "failed to open stores").

+                let had_errors = store_names.iter().all(|&name| {
+                    open_fns.iter().all(|open_fn| open_fn(name).is_err())
+                });
+
                 if *self.x509_cert_count.read() == 0 {
+                    if !had_errors {
+                        // Stores opened but were empty - not an error
+                        return Ok(());
+                    }
                     return Err(vm.new_os_error(
                         "Failed to load certificates from Windows store".to_owned(),
                     ));
                 }

Committable suggestion skipped: line range outside the PR's diff.

In crates/stdlib/src/ssl.rs around lines 1459-1520, the Windows branch currently
returns an error whenever x509_cert_count == 0; change it to mirror the
non-Windows behavior by collecting errors while attempting to open stores and
iterate certs, and only return an error if no certs were loaded and there were
errors. Specifically: add a Vec<String> to accumulate failures from
open_fn(store_name) and any store iteration failures, continue loading any certs
that succeed and increment counts as before, and after the loops if
x509_cert_count == 0 then if errors is non-empty return a vm.os_error with the
first error, else return a vm.os_error stating the stores were opened but
contain no certificates; otherwise return Ok(()).

⚠️ Potential issue | 🟡 Minor

Return None instead of empty strings for Windows certificate paths to match CPython behavior.

CPython's ssl.get_default_verify_paths() returns None for the cafile and capath fields when the hardcoded default paths do not exist on Windows (rather than returning empty strings). The current implementation returning Some("") on Windows (lines 4349-4350) deviates from this behavior. Update to return None or the actual path if it exists, consistent with how macOS and Linux are handled.

In crates/stdlib/src/ssl.rs around lines 4346 to 4353, the Windows branch
currently returns Some("") for (default_cafile, default_capath) which differs
from CPython; change the Windows branch to return (None, None) when no valid
cafile/capath exists (or the actual path wrapped in Some(...) if you detect a
real file/directory), matching the macOS/Linux logic and CPython behavior so
absent/default paths are represented as None rather than empty strings.