"when debug-printing compiler state, do not include spans"), // o/w tests have closure@path
identify_regions: bool = (false, parse_bool, [UNTRACKED],
"make unnamed regions display as '# (where # is some non-ident unique id)"),
- emit_end_regions: bool = (false, parse_bool, [UNTRACKED],
- "emit EndRegion as part of MIR; enable transforms that solely process EndRegion"),
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],