LLDB prints wrong UUID value

Development LLDB
, , , ,
1

LLDB prints the wrong UUID value when unwrapping it as an associated value within a switch‑case statement.

let's consider following example:

enum MyEnum {
    case firstCase(UUID)
}

let myEnum = MyEnum.firstCase(UUID(uuidString: "00000000-0000-0000-0000-000000000000")!)

switch myEnum {
case .firstCase(let uuid):
    print(uuid)
}

When I step into the print statement and type po/p/v in LLDB, it prints out C0F1DF6F-0100-0000-E0F4-DF6F01000000, even though a null UUID was provided. However, when I compile using the release build configuration, the problem disappears.

1 Like
2

Hi Alexander, is this standalone example enough to reproduce the bug? I could not reproduce it with the latest main lldb.

3

Hi, this bug is reproducible in the App Store version of Xcode with newly created command line application.

4

Indeed, this bug is fixed in the latest beta.

1 Like