1export fn foo() void {
 2    var x: i32 = 1234;
 3    x += 1;
 4    _ = x;
 5}
 6export fn bar() void {
 7    var b: u32 = 1;
 8    _ = blk: {
 9        const a = 1;
10        b = a;
11        break :blk a;
12    };
13}
14
15// error
16//
17// :4:9: error: pointless discard of local variable
18// :3:5: note: used here