1const std = @import("std");
 2
 3pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
 4    _ = stack_trace;
 5    if (std.mem.eql(u8, message, "invalid error code")) {
 6        std.process.exit(0);
 7    }
 8    std.process.exit(1);
 9}
10const Set1 = error{ A, B };
11const Set2 = error{ A, C };
12pub fn main() !void {
13    foo(Set1.B) catch {};
14    return error.TestFailed;
15}
16fn foo(set1: Set1) Set2 {
17    return @errorCast(set1);
18}
19// run
20// backend=selfhosted,llvm
21// target=x86_64-linux