*Tested with OSVM 202003021730 (Squeak5.3 release VM) on macOS Catalina.*

``` Squeak5.3-19439-64bit.app $ ./Contents/MacOS/Squeak

Segmentation fault Mon Jun 22 22:47:47 2020

VM: 202003021730 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Mon Mar 2 18:30:55 2020 CommitHash: 6a0bc96 Plugins: 202003021730 https://github.com/OpenSmalltalk/opensmalltalk-vm.git

C stack backtrace & registers: rax 0xfffffffffffffff8 rbx 0x0000000000000001 rcx 0x0000000000000001 rdx 0x0000000101b6f620 rdi 0x0000000000000000 rsi 0x0000000000000009 rbp 0x00007ffeee184d60 rsp 0x00007ffeee184d60 r8 0x000000010809d8c0 r9 0x0000000000000003 r10 0x0000000107435918 r11 0x0000000109934c70 r12 0x00007ffeee191bf8 r13 0x000000010809d8c0 r14 0x0000000000000028 r15 0x0000000000000000 rip 0x0000000101a7b171 0 Squeak 0x0000000101a7b171 sizeOfSTArrayFromCPrimitive + 12 1 Squeak 0x0000000101ad8880 reportStackState + 818 2 Squeak 0x0000000101ad8bd4 sigsegv + 195 3 libsystem_platform.dylib 0x00007fff6ecda5fd _sigtramp + 29 4 ??? 0x0000000000000000 0x0 + 0 5 Squeak 0x0000000101b2178d primitiveIndexOfAsciiInString + 123 6 Squeak 0x0000000101a5cd6d primitiveExternalCall + 228 7 Squeak 0x0000000101a8de00 slowPrimitiveResponse + 94 8 Squeak 0x0000000101a5b01b executeNewMethod + 91 9 Squeak 0x0000000101a5bd71 ceSendsupertonumArgs + 1024 10 ??? 0x00000001072fe1b0 0x0 + 4415545776 11 Squeak 0x0000000101a47fe2 interpret + 630 12 Squeak 0x0000000101ad9ff1 -[sqSqueakMainApplication runSqueak] + 393 13 Foundation 0x00007fff3727729b __NSFirePerformWithOrder + 360 14 CoreFoundation 0x00007fff34ae63c5 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23 15 CoreFoundation 0x00007fff34ae62f7 __CFRunLoopDoObservers + 457 16 CoreFoundation 0x00007fff34ae5895 __CFRunLoopRun + 874 17 CoreFoundation 0x00007fff34ae4ece CFRunLoopRunSpecific + 462 18 HIToolbox 0x00007fff33713abd RunCurrentEventLoopInMode + 292 19 HIToolbox 0x00007fff337136f4 ReceiveNextEventCommon + 359 20 HIToolbox 0x00007fff33713579 _BlockUntilNextEventMatchingListInModeWithFilter + 64 21 AppKit 0x00007fff31d5b829 _DPSNextEvent + 883 22 AppKit 0x00007fff31d5a070 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352 23 AppKit 0x00007fff31d4bd7e -[NSApplication run] + 658 24 AppKit 0x00007fff31d1db86 NSApplicationMain + 777 25 libdyld.dylib 0x00007fff6eae1cc9 start + 1

Smalltalk stack dump: 0x7ffeee191bf8 M CompiledMethod(ByteArray)>indexOf:startingAt: 0x108056db0: a(n) CompiledMethod 0x7ffeee191c38 M CompiledMethod(SequenceableCollection)>indexOf: 0x108056db0: a(n) CompiledMethod 0x7ffeee191c70 M CompiledMethod(SequenceableCollection)>includes: 0x108056db0: a(n) CompiledMethod 0x7ffeee191ca8 M UndefinedObject>DoIt 0x107ce58e0: a(n) UndefinedObject 0x7ffeee191d00 I Compiler>evaluateCue:ifFail: 0x1074f25e0: a(n) Compiler 0x7ffeee191d58 I Compiler>evaluateCue:ifFail:logged: 0x1074f25e0: a(n) Compiler 0x7ffeee191db0 I Compiler>evaluate:in:to:environment:notifying:ifFail:logged: 0x1074f25e0: a(n) Compiler 0x7ffeee191e28 M [] in SmalltalkEditor(TextEditor)>evaluateSelectionAndDo: 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee191e60 M BlockClosure>on:do: 0x1074f2938: a(n) BlockClosure 0x7ffeee192950 I SmalltalkEditor(TextEditor)>evaluateSelectionAndDo: 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee192998 I SmalltalkEditor(TextEditor)>printIt 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee1929d8 I SmalltalkEditor(TextEditor)>printIt: 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee192a30 I SmalltalkEditor(TextEditor)>dispatchOnKeyboardEvent: 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee192a78 I SmalltalkEditor(TextEditor)>keyStroke: 0x1074f27e8: a(n) SmalltalkEditor 0x7ffeee192ab8 M [] in TextMorphForEditView(TextMorph)>keyStroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192b08 M TextMorphForEditView(TextMorph)>handleInteraction:fromEvent: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192b48 M TextMorphForEditView>handleInteraction:fromEvent: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192b98 M [] in TextMorphForEditView(TextMorph)>keyStroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192bd8 I StandardToolSet class>codeCompletionAround:textMorph:keyStroke: 0x1080b25b0: a(n) StandardToolSet class 0x7ffeee192c30 I ToolSet class>codeCompletionAround:textMorph:keyStroke: 0x1080aaeb8: a(n) ToolSet class 0x7ffeee192c78 M TextMorphForEditView(TextMorph)>keyStroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192cc8 I TextMorphForEditView>keyStroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192d18 I TextMorphForEditView(Morph)>handleKeystroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192d68 I TextMorphForEditView(TextMorph)>handleKeystroke: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192da0 M KeyboardEvent>sentTo: 0x1074f2bf0: a(n) KeyboardEvent 0x7ffeee192de0 M TextMorphForEditView(Morph)>handleEvent: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192e18 M TextMorphForEditView(Morph)>handleFocusEvent: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee192e60 M MorphicEventDispatcher>doHandlingForFocusEvent:with: 0x1074f19f8: a(n) MorphicEventDispatcher 0x7ffeee186868 M MorphicEventDispatcher>dispatchFocusEvent:with: 0x1074f19f8: a(n) MorphicEventDispatcher 0x7ffeee1868a8 M TextMorphForEditView(Morph)>processFocusEvent:using: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee1868e8 M TextMorphForEditView(Morph)>processFocusEvent: 0x10745c8d8: a(n) TextMorphForEditView 0x7ffeee186938 M [] in HandMorph>sendFocusEvent:to:clear: 0x108437960: a(n) HandMorph 0x7ffeee186978 M BlockClosure>ensure: 0x1074f1ad8: a(n) BlockClosure 0x7ffeee1869b8 M KeyboardEvent(MorphicEvent)>becomeActiveDuring: 0x1074f1830: a(n) KeyboardEvent 0x7ffeee186a08 M [] in HandMorph>sendFocusEvent:to:clear: 0x108437960: a(n) HandMorph 0x7ffeee186a48 M BlockClosure>ensure: 0x1074f1ca8: a(n) BlockClosure 0x7ffeee186a88 M HandMorph>becomeActiveDuring: 0x108437960: a(n) HandMorph 0x7ffeee186ad8 M [] in HandMorph>sendFocusEvent:to:clear: 0x108437960: a(n) HandMorph 0x7ffeee186b18 M BlockClosure>ensure: 0x1074f1e78: a(n) BlockClosure 0x7ffeee186b58 M PasteUpMorph>becomeActiveDuring: 0x108190d20: a(n) PasteUpMorph 0x7ffeee186ba0 M HandMorph>sendFocusEvent:to:clear: 0x108437960: a(n) HandMorph 0x7ffeee186bf8 M HandMorph>sendEvent:focus:clear: 0x108437960: a(n) HandMorph 0x7ffeee186c40 M HandMorph>sendKeyboardEvent: 0x108437960: a(n) HandMorph 0x7ffeee186c80 M HandMorph>handleEvent: 0x108437960: a(n) HandMorph 0x7ffeee186cd8 M HandMorph>processEvents 0x108437960: a(n) HandMorph 0x7ffeee186d10 M [] in WorldState>doOneCycleNowFor: 0x1083735e0: a(n) WorldState 0x7ffeee186d58 M Array(SequenceableCollection)>do: 0x107d0a660: a(n) Array 0x7ffeee186d90 M WorldState>handsDo: 0x1083735e0: a(n) WorldState 0x7ffeee186dd0 M WorldState>doOneCycleNowFor: 0x1083735e0: a(n) WorldState 0x7ffeee186e08 M WorldState>doOneCycleFor: 0x1083735e0: a(n) WorldState 0x7ffeee186e40 M PasteUpMorph>doOneCycle 0x108190d20: a(n) PasteUpMorph 0x7ffeee186e70 M [] in MorphicProject>spawnNewProcess 0x108551af8: a(n) MorphicProject 0x10ac31138 s [] in BlockClosure>newProcess

Most recent primitives collect:from:to: value at: at: buildTreeFrom:maxDepth: buildTreeFrom:maxDepth: buildTreeFrom:maxDepth: buildTreeFrom:maxDepth: buildTreeFrom:maxDepth: new: second removeFirst parent: parent: parent: parent: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: size at: size at: at: at:put: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: bitLengthAt: bitLengthAt: bitLengthAt: maxCode maxCode maxCode bitLengthAt: bitLengthAt: bitLengthAt: bitLengthAt: bitLengthAt: bitLengthAt: bitLengthAt: bitLengthAt: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: value:value: with:do: with:do: with:do: with:do: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: at: bitPosition bitPosition bitPosition basicNew size on:from:to: on:from:to: at: nextBits:put: nextBits:put: nextBits:put: byteAt:put: byteAt:put: nextBytePut: bitXor: size replaceFrom:to:with:startingAt: size replaceFrom:to:with:startingAt: encodeLengthField: assert: assert: size size size size wordSize size at: at: at: perform: size createMethod:class:header: createMethod:class:header: createMethod:class:header: createMethod:class:header: createMethod:class:header: createMethod:class:header: at:put: at:put: at:put: objectAt: objectAt:put: literalAt: objectAt:put: objectAt:put: objectAt:put: objectAt:put: objectAt:put: at: at:put: at: at:put: at: at:put: at: at:put: at: at:put: basicNew withArgs:executeMethod: someInstance **IncrementalGC** wait value wait value signal wait finalizeValues finalizeValues signal wait signal signal wait indexOfAscii:inString:startingAt:

stack page bytes 4096 available headroom 1480 minimum unused headroom 1936

(Segmentation fault) ```