Labeled switch causes all switch prongs to be analyzed

[chadwain]

Zig Version

0.14.0-dev.2577+271452d22

Steps to Reproduce and Observed Behavior

pub fn main() void {
    const x: u2 = 0;
    sw: switch (x) {
        0 => {},
        1 => continue :sw 0,
        2, 3 => @compileError("bad"),
    }
}

test.zig:6:17: error: bad
        2, 3 => @compileError("bad"),
                ^~~~~~~~~~~~~~~~~~~~

Expected Behavior

No compilation error, as comptime-known unreachable switch prongs should not be analyzed.