#zig build-exe {
--name test
-Mroot=test.zig
#}

#write test.zig {
const std = @import("std");

pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
    _ = stack_trace;
    if (std.mem.eql(u8, message, "unexpected error code, found error.B")) {
        std.process.exit(0);
    }
    std.process.exit(1);
}
const Set1 = error{ A, B };
const Set2 = error{ A, C };
pub fn main() !void {
    foo(Set1.B) catch {};
    return error.TestFailed;
}
fn foo(set1: Set1) Set2 {
    return @errorCast(set1);
}
#}
#update
#check exit "0"
