the fix

@@ -192,6 +193,8 @@ bool autokeyframe_property(bContext *C,
  * expected to be the size of the property array.
  * \param frame: is expected to be in the local time of the action, meaning it has to be NLA mapped
  * already.
+ * \param keying_mask is expected to have the same size as `rna_path`. A false bit means that index

@@ -488,2 +501,4 @@
 
 
+def _create_nla_anim_object():
+    # Creates an object with 3 NLA tracks each with a strip that has its own action.

@@ -490,0 +545,4 @@
+        super().setUp()
+        bpy.context.preferences.edit.key_insert_channels = {'LOCATION'}
+        # Change one area to the NLA so we can call operators in it.
+        # Assumes there is at least one window in the blender default startup file that is not the 3D viewport.

@@ -490,0 +595,4 @@
+            bpy.ops.anim.keyframe_insert()
+
+        base_action = bpy.data.actions["action_base"]
+        # This should add keys to Y and Z but not X.

@@ -217,2 +221,3 @@
                     Main *bmain,
-                    ReportList *reports);
+                    ReportList *reports,
+                    const AnimationEvalContext *anim_eval_context);