1export fn entry1() void {
 2    _ = foo();
 3}
 4fn foo() !void {
 5    return error.OutOfMemory;
 6}
 7export fn entry2() void {
 8    const x: error{a} = undefined;
 9    _ = x;
10}
11
12// error
13//
14// :2:12: error: error union is discarded
15// :2:12: note: consider using 'try', 'catch', or 'if'
16// :9:9: error: error set is discarded