"make unnamed regions display as '# (where # is some non-ident unique id)"),
borrowck: Option<String> = (None, parse_opt_string, [UNTRACKED],
"select which borrowck is used (`ast`, `mir`, `migrate`, or `compare`)"),
- two_phase_borrows: bool = (false, parse_bool, [UNTRACKED],
- "use two-phase reserved/active distinction for `&mut` borrows in MIR borrowck"),
two_phase_beyond_autoref: bool = (false, parse_bool, [UNTRACKED],
"when using two-phase-borrows, allow two phases even for non-autoref `&mut` borrows"),
time_passes: bool = (false, parse_bool, [UNTRACKED],