bug? bzr unable to commit added+missed file by name

[Alexander Belchenko]

I'd like to know is it bug or it's by design:

C:\Temp>bzr init qcommit
Standalone tree (format: pack-0.92)
Location:
   branch root: qcommit

C:\Temp\qcommit>bzr mkdir foo
added foo

C:\Temp\qcommit>bzr ignore bar

C:\Temp\qcommit>del .bzrignore

C:\Temp\qcommit>bzr commit foo .bzrignore
Committing to: C:/Temp/qcommit/
missing .bzrignore
added foo
bzr: ERROR: Path(s) do not exist: .bzrignore


If I run `bzr commit foo` then .bzrignore will stay in inventory as added+missed file forever.
If I run `bzr commit` then .bzrignore will be deleted from inventory.