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An alternate type's visit_type_FOO() fails when it runs into an invalid ->type. If it's an input visit, we then need to free the the object we got from visit_start_alternate(). We do that with qapi_free_FOO(), which uses the dealloc visitor. Trouble is that object is in a bad state: its ->type is invalid. So the dealloc visitor will run into the same error again, and the error recovery skips deallocating the alternate's (invalid) alternative. Works, because qapi_free_FOO() ignores the error. Avoid it instead: free the messed up object with by g_free(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200424084338.26803-11-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>