diff -r 71ebe880f24a -r 4e34e8fd46d4 rust/hg-pyo3/src/exceptions.rs
--- a/rust/hg-pyo3/src/exceptions.rs	Wed Dec 25 11:58:56 2024 +0100
+++ b/rust/hg-pyo3/src/exceptions.rs	Wed Dec 25 16:16:22 2024 +0100
@@ -54,6 +54,10 @@
     mercurial_py_errors::RevlogError::new_err(e.to_string().into_bytes())
 }
 
+pub fn revlog_error_bare() -> PyErr {
+    mercurial_py_errors::RevlogError::new_err((None::<String>,))
+}
+
 pub fn nodemap_error(err: NodeMapError) -> PyErr {
     match err {
         NodeMapError::MultipleResults => {