# LLDB-RPC-Server Playgrounds Crash

**URL:** <https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659>\
**Category:** LLDB\
**Created:** [October 28, 2024, 12:10am UTC](https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659 "2024-10-28T00:10:02Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sean.Batson](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/sean.batson/32/40290_2.png) [@Sean.Batson](https://forums.swift.org/u/Sean.Batson)\
**Post date:** [October 28, 2024, 12:10am UTC](https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659/1 "2024-10-28T00:10:02Z")

</div>

For some reason the following crashes on Xcode 16.1 RC Playgrounds Platforms iOS, Swift 6. No issues on Swift 5

```swift
import Cocoa

protocol VirtualPaksProtocol {
    associatedtype Base
    var base: Base { get }
}

struct VirtualPaks: VirtualPaksProtocol {
    typealias Base = Void
    var base: Base
    func echo() {
        
    }
}

func genericPaks<P: VirtualPaksProtocol>(_ p: P) -> P.Base {
    p.base
}

func opaquePaks() -> some VirtualPaksProtocol {
    VirtualPaks(base: ())
}

func boxedPaks() -> any VirtualPaksProtocol {
    VirtualPaks(base: ())
}

genericPaks(opaquePaks())
genericPaks(boxedPaks())
genericPaks(VirtualPaks(base: ()))
boxedPaks()
opaquePaks()

```

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<div class="post-metadata">

**Author:** ![augusto2112](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/augusto2112/32/10731_2.png) [@augusto2112](https://forums.swift.org/u/augusto2112)\
**Post date:** [October 31, 2024, 9:44pm UTC](https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659/2 "2024-10-31T21:44:11Z")

</div>

Hi Sean,

Could you open a feedback request ([Bug Reporting - Apple Developer](https://developer.apple.com/bug-reporting/)) with lldb-rpc-server's crash log under "~/Library/Logs/DiagnosticReports/"?

---

<div class="post-metadata">

**Author:** ![Sean.Batson](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/sean.batson/32/40290_2.png) [@Sean.Batson](https://forums.swift.org/u/Sean.Batson)\
**Post date:** [November 1, 2024, 2:59am UTC](https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659/3 "2024-11-01T02:59:02Z")

</div>

Hi Augusto  
Submitted: FB15649797

---

<div class="post-metadata">

**Author:** ![kelin](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/kelin/32/21678_2.png) [@kelin](https://forums.swift.org/u/kelin)\
**Post date:** [April 15, 2025, 11:13am UTC](https://forums.swift.org/t/lldb-rpc-server-playgrounds-crash/75659/4 "2025-04-15T11:13:23Z")

</div>

Same problem in any playground, Xcode 16.2. FB17236853