That's wrong user input and should result in '400 Bad Request'. The handling of the InvalidMergeStrategyException in CreateMergePatchSet is consistent with the handling of the same exception in CreateChange. Signed-off-by: Edwin Kempin <ekempin@google.com> Change-Id: Iaf1cdbf00108191f7cf3d4d9497b0ca5e4ba0c34