fn alloc_env_var<'tcx>(
ecx: &mut InterpCx<'tcx, MiriMachine<'tcx>>,
name: &OsStr,
value: &OsStr
) -> InterpResult<'tcx, Pointer<Option<Provenance>>>fn alloc_env_var<'tcx>(
ecx: &mut InterpCx<'tcx, MiriMachine<'tcx>>,
name: &OsStr,
value: &OsStr
) -> InterpResult<'tcx, Pointer<Option<Provenance>>>