gitutil.CheckoutRoot's refusal for a repo-shaped tree git will not answer for names three causes (git absent from PATH, the repository unreadable, its ownership refused) and omits the fourth that Toplevel's shape check refuses: a core.worktree setting whose working tree does not contain the working directory. A person in that checkout is offered three causes, none of which is theirs.

gitutil.CheckoutRoot's refusal for a repo-shaped tree git will not answer for names three causes (git absent from PATH, the repository unreadable, its ownership refused) and omits the fourth that Toplevel's shape check refuses: a core.worktree setting whose working tree does not contain the working directory. A person in that checkout is offered three causes, none of which is theirs.

Grounds

• pursued: every cause Toplevel can refuse on is named; TestCheckoutRootRefusalNamesAWorktreeSettingPointingElsewhere drives real git with core.worktree set and would fail if the cause were dropped