diff -r 736551565871 -r 4c9e31984b3a rust/hg-pyo3/src/exceptions.rs
--- a/rust/hg-pyo3/src/exceptions.rs	Sat Dec 07 18:24:24 2024 +0100
+++ b/rust/hg-pyo3/src/exceptions.rs	Sat Dec 07 18:38:37 2024 +0100
@@ -1,4 +1,4 @@
-use pyo3::exceptions::PyValueError;
+use pyo3::exceptions::{PyRuntimeError, PyValueError};
 use pyo3::import_exception;
 use pyo3::{create_exception, PyErr};
 
@@ -32,3 +32,7 @@
         }
     }
 }
+
+pub fn map_lock_error<T>(e: std::sync::PoisonError<T>) -> PyErr {
+    PyRuntimeError::new_err(format!("In Rust PyO3 bindings: {e}"))
+}