id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30501	Queryset ordering and Meta.ordering are mutable on expressions with reverse().	Mariusz Felisiak	Mariusz Felisiak	"Queryset order and `Meta.ordering` are mutable with `reverse()`.

Bug revealed by running `./runtests.py ordering.test --reverse` (reproduced at a2c31e12da272acc76f3a3a0157fae9a7f6477ac).

It seems that test added in f218a2ff455b5f7391dd38038994f2c5f8b0eca1 wasn't correct because order mutates on queryset execution in [https://github.com/django/django/blob/a2c31e12da272acc76f3a3a0157fae9a7f6477ac/django/db/models/sql/compiler.py#L253 SQLCompiler.get_order_by()].
"	Bug	closed	Database layer (models, ORM)	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0