diff -r 595979dc924e -r 50c5ee3bdf9a rust/hg-cpython/src/lib.rs
--- a/rust/hg-cpython/src/lib.rs	Thu Oct 01 18:51:06 2020 +0200
+++ b/rust/hg-cpython/src/lib.rs	Thu Oct 01 18:51:40 2020 +0200
@@ -29,6 +29,7 @@
 mod conversion;
 #[macro_use]
 pub mod ref_sharing;
+pub mod copy_tracing;
 pub mod dagops;
 pub mod debug;
 pub mod dirstate;
@@ -49,6 +50,11 @@
     m.add(py, "ancestor", ancestors::init_module(py, &dotted_name)?)?;
     m.add(py, "dagop", dagops::init_module(py, &dotted_name)?)?;
     m.add(py, "debug", debug::init_module(py, &dotted_name)?)?;
+    m.add(
+        py,
+        "copy_tracing",
+        copy_tracing::init_module(py, &dotted_name)?,
+    )?;
     m.add(py, "discovery", discovery::init_module(py, &dotted_name)?)?;
     m.add(py, "dirstate", dirstate::init_module(py, &dotted_name)?)?;
     m.add(py, "revlog", revlog::init_module(py, &dotted_name)?)?;