#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
export fn entry() void {
    foo(452) catch |err| switch (err) {
        error.Foo => {},
        error.Bar => {},
        error.Foo => {},
        else => {},
    };
}
fn foo(x: i32) !void {
    switch (x) {
        0...10 => return error.Foo,
        11...20 => return error.Bar,
        else => {},
    }
}
#}
#update
#check errors {
test.zig:5:9: error: duplicate switch value 'error.Foo'
test.zig:3:9: note: previous value here
#}
