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Issue Description:

I upgraded to Xcode 13 from 12.5 and I was practising some code and was running fine. All of a sudden I started getting compilation error namely

Abort trap: 6

I have no idea what it is, but it was mentioned that the compiler crashed hence I need to report this. I'm providing the stack trace and the code which I was working on below for your reference.

Stack dump:

0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c "/Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/View Controllers/ViewController.swift" /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/Deque_LinkedList.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/RingBuffer.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/QueueStack.swift "/Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/View Controllers/AppDelegate.swift" /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/LinkedList/LinkedList.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/QueueRingBuffer.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/LinkedList/LinkedListViewController.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/LinkedList/LinkedListNode.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/QueueViewController.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/DoublyLinkedList.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/Stack.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Tree/TreeNode.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/Queue_LinkedList.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/LinkedList/Helpers.swift "/Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/View Controllers/SceneDelegate.swift" /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/BoardGame.swift -primary-file /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Tree/TreeViewController.swift /Users/amankumar/Documents/My_Docs/Practise/Practice/Practice/Queue/Queue_Array.swift -emit-module-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewControllerpartial.swiftmodule -emit-module-doc-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewControllerpartial.swiftdoc -emit-module-source-info-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewController~partial.swiftsourceinfo -emit-dependencies-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewController.d -emit-reference-dependencies-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewController.swiftdeps -serialize-diagnostics-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewController.dia -target x86_64-apple-ios14.5-simulator -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.0.sdk -I /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Products/Debug-iphonesimulator -F /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Products/Debug-iphonesimulator -enable-testing -g -module-cache-path /Users/amankumar/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=checked -Onone -D DEBUG -new-driver-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-driver -serialize-debugging-options -Xcc -working-directory -Xcc /Users/amankumar/Documents/My_Docs/Practise/Practice -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Practice-generated-files.hmap -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Practice-own-target-headers.hmap -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Practice-all-target-headers.hmap -Xcc -iquote -Xcc /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Practice-project-headers.hmap -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Products/Debug-iphonesimulator/include -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/DerivedSources-normal/x86_64 -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/DerivedSources/x86_64 -Xcc -I/Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/DerivedSources -Xcc -DDEBUG=1 -module-name Practice -target-sdk-version 15.0.0 -o /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Build/Intermediates.noindex/Practice.build/Debug-iphonesimulator/Practice.build/Objects-normal/x86_64/TreeViewController.o -index-store-path /Users/amankumar/Library/Developer/Xcode/DerivedData/Practice-elhsgjgoeutdqycwhwmxzbogkkfy/Index/DataStore -index-system-modules

1. Apple Swift version 5.5 (swiftlang-1300.0.31.1 clang-1300.0.29.1)

3. Running pass 'Module Verifier' on function '@"$s8Practice18TreeViewControllerC17displayLevelOrderyyAA0B4NodeCyxGlF"'

Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var LLVM_SYMBOLIZER_PATH to point to it):

0 swift-frontend 0x00000001083916f7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 39

1 swift-frontend 0x0000000108390688 llvm::sys::RunSignalHandlers() + 248

2 swift-frontend 0x0000000108391d06 SignalHandler(int) + 278

3 libsystem_platform.dylib 0x00007fff2040dd7d _sigtramp + 29

4 libsystem_platform.dylib 0x00007ffeec81dbe0 _sigtramp + 18446744072841395840

5 libsystem_c.dylib 0x00007fff2031d406 abort + 125

6 swift-frontend 0x00000001034bef02 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*)::$_2::__invoke(void*, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, bool) + 978

7 swift-frontend 0x00000001082db16e llvm::report_fatal_error(llvm::Twine const&, bool) + 286

8 swift-frontend 0x00000001082db04b llvm::report_fatal_error(char const*, bool) + 43

9 swift-frontend 0x0000000108271c2f (anonymous namespace)::VerifierLegacyPass::runOnFunction(llvm::Function&) + 111

10 swift-frontend 0x000000010820be3a llvm::FPPassManager::runOnFunction(llvm::Function&) + 1354

11 swift-frontend 0x000000010820b121 llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&) + 113

12 swift-frontend 0x0000000108212645 llvm::legacy::FunctionPassManager::run(llvm::Function&) + 341

13 swift-frontend 0x00000001039a2991 swift::performLLVMOptimizations(swift::IRGenOptions const&, llvm::Module*, llvm::TargetMachine*) + 1585

14 swift-frontend 0x00000001039a37e7 swift::performLLVM(swift::IRGenOptions const&, swift::DiagnosticEngine&, llvm::sys::SmartMutex, llvm::GlobalVariable, llvm::Module*, llvm::TargetMachine*, llvm::StringRef, swift::UnifiedStatsReporter*) + 2039

15 swift-frontend 0x00000001034ca699 performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_deleteswift::SILModule >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 3529

16 swift-frontend 0x00000001034bbd46 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 13494

17 swift-frontend 0x00000001033fda48 main + 1032

18 libdyld.dylib 0x00007fff203e3f3d start + 1

error: Abort trap: 6 (in target 'Practice' from project 'Practice')