bugfix in data file bundling

src/scgenerator/spectra.py

@@ -566,9 +566,10 @@ def _create_new_propagation(
     io: PropagationIOHandler, params: Parameters, bundle_data: bool
 ) -> Propagation:
     if params.frozen:
-        params = params.copy()
+        params = params.copy(deep=True)
     else:
-        params = params.compile(exhaustive=True, strict=False)
+        params = params.copy(deep=True)
+        params.compile_in_place(exhaustive=True, strict=False)
     if bundle_data:
         _bundle_external_files(params, io)
     io.save_data(PARAMS_FN, params.to_json().encode())

tests/test_io_handlers.py

@@ -142,11 +142,15 @@ def test_zip_bundle(tmp_path: Path):
     params.freeze()
 
     prop2 = propagation(tmp_path / "file3.zip", params, bundle_data=True)
+    assert prop2.parameters is not params
+    assert prop2.parameters.dispersion_file is not params.dispersion_file
 
-    assert prop2.parameters.dispersion_file.path == new_disp_path.name
-    assert prop2.parameters.dispersion_file.prefix == "zip"
-    assert prop2.parameters.effective_area_file.path == new_aeff_path.name
-    assert prop2.parameters.effective_area_file.prefix == "zip"
+    prop3 = propagation(tmp_path / "file3.zip")
+
+    assert prop3.parameters.dispersion_file.path == new_disp_path.name
+    assert prop3.parameters.dispersion_file.prefix == "zip"
+    assert prop3.parameters.effective_area_file.path == new_aeff_path.name
+    assert prop3.parameters.effective_area_file.prefix == "zip"
 
     with ZipFile(tmp_path / "file3.zip", "r") as zfile:
         with zfile.open(new_aeff_path.name) as file: