1pub export fn entry() void {
 2    var a: [:0]const u8 = "foo";
 3    _ = &a;
 4    switch (a) {
 5        ("--version"), ("version") => unreachable,
 6        else => {},
 7    }
 8}
 9
10// error
11//
12// :4:13: error: switch on type '[:0]const u8'