1fn entry0() void {
 2    var a: u32 = 1 + 2;
 3    _ = a;
 4}
 5
 6fn entry1() void {
 7    const a: u32 = 1;
 8    const b: u32 = 2;
 9    var c = a + b;
10    const d = c;
11    _ = d;
12}
13
14fn entry2() void {
15    var a: u32 = 123;
16    foo(a);
17}
18
19fn foo(_: u32) void {}
20
21// error
22//
23// :2:9: error: local variable is never mutated
24// :2:9: note: consider using 'const'
25// :9:9: error: local variable is never mutated
26// :9:9: note: consider using 'const'
27// :15:9: error: local variable is never mutated
28// :15:9: note: consider using 'const'