Fix keeping unstructuring overrides

Author: Tinche

src/cattrs/gen/__init__.py

@@ -136,7 +136,7 @@ def make_dict_unstructure_fn(
     try:
         for a in attrs:
             attr_name = a.name
-            override = kwargs.pop(attr_name, neutral)
+            override = kwargs.get(attr_name, neutral)
             if override.omit:
                 continue
             if override.omit is None and not a.init and not _cattrs_include_init_false:

tests/test_gen_dict.py

@@ -201,6 +201,7 @@ def test_renaming(cl_and_vals, data):
         cl, converter, **{to_replace.name: override(rename="class")}
     )
     assert s_fn.overrides == {to_replace.name: override(rename="class")}
+    assert u_fn.overrides == {to_replace.name: override(rename="class")}
 
     converter.register_structure_hook(cl, s_fn)
     converter.register_unstructure_hook(cl, u_fn)