Hi,

I kind of missed the open alpha of "Scorch" and to make up for it I tried to follow the instructions on Pharo7 but I do crash the VM. Is that to be expected?

"Add special selector for trap instruction"
Smalltalk specialObjectsArray at: 60 put: #trapTripped.
"Disable hot spot detection (to load the Scorch code)"
Smalltalk specialObjectsArray at: 59 put: nil.
"Recompile the fetch mourner primitive which has strange side-effect with alternate bytecode set and closures"
WeakArray class compile: 'primitiveFetchMourner ^ nil' classified: #patch.
"Enable FullBlockClosure and alternate bytecode set"
CompilationContext bytecodeBackend: OpalEncoderForSistaV1.
CompilationContext usesFullBlockClosure: true.
OpalCompiler recompileAll.


If I only execute the last three lines it is crashing as well but at a different point in the VM?


(lldb) bt
* thread #1: tid = 0x5636d2, 0xa165e496 libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
�� * frame #0: 0xa165e496 libsystem_kernel.dylib`__pthread_kill + 10
�� �� frame #1: 0xa1744c63 libsystem_pthread.dylib`pthread_kill + 90
�� �� frame #2: 0xa15bea34 libsystem_c.dylib`abort + 141
�� �� frame #3: 0x00087128 Pharo`error + 55
�� �� frame #4: 0x000132e6 Pharo`lookupMethodInClass + 601
�� �� frame #5: 0x000085c1 Pharo`interpret + 25756
�� �� frame #6: 0x00011b9a Pharo`enterSmalltalkExecutiveImplementation + 135
�� �� frame #7: 0x000023ab Pharo`interpret + 646
�� �� frame #8: 0x000889d9 Pharo`-[sqSqueakMainApplication runSqueak] + 476
�� �� frame #9: 0x95ac4a1b Foundation`__NSFirePerformWithOrder + 419
�� �� frame #10: 0x942811fe CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
�� �� frame #11: 0x94281157 CoreFoundation`__CFRunLoopDoObservers + 391
�� �� frame #12: 0x942614a2 CoreFoundation`__CFRunLoopRun + 1058
�� �� frame #13: 0x94260e1a CoreFoundation`CFRunLoopRunSpecific + 506
�� �� frame #14: 0x94260c0b CoreFoundation`CFRunLoopRunInMode + 123
�� �� frame #15: 0x93954396 HIToolbox`RunCurrentEventLoopInMode + 268
�� �� frame #16: 0x93954057 HIToolbox`ReceiveNextEventCommon + 195
�� �� frame #17: 0x93953f7b HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 83
�� �� frame #18: 0x91f86015 AppKit`_DPSNextEvent + 1227
�� �� frame #19: 0x926ebbbb AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1742
�� �� frame #20: 0x926eb4e5 AppKit`-[NSApplication(NSEvent) nextEventMatchingMask:untilDate:inMode:dequeue:] + 132
�� �� frame #21: 0x91f7acb6 AppKit`-[NSApplication run] + 943
�� �� frame #22: 0x91f47d1e AppKit`NSApplicationMain + 1368
�� �� frame #23: 0xa152f395 libdyld.dylib`start + 1
(lldb) p (int) activeProcess()
(int) $0 = 115378352
(lldb) p/x (int) activeProcess()
(int) $1 = 0x06e088b0
(lldb) p (void) printAllStacks()
Process�� 0x6e088b0 priority 40
0xbfffc124 I FileReference(AbstractFileReference)>writeStreamDo: 0x9a303d8: a(n) FileReference
0xbfffc144 M [] in OmBlockFileStore(OmFileStore)>flushEntryBuffer 0x9a2c3c0: a(n) OmBlockFileStore
0xbfffc164 M [] in Semaphore>critical: 0x6e08898: a(n) Semaphore
0xbfffc184 M BlockClosure>ensure: 0x6f2d1f8: a(n) BlockClosure
0xbfffc1a4 M Semaphore>critical: 0x6e08898: a(n) Semaphore
0xbfffc1c8 I OmBlockFileStore(OmFileStore)>critical: 0x9a2c3c0: a(n) OmBlockFileStore
0xbfffc1e4 M OmBlockFileStore(OmFileStore)>flushEntryBuffer 0x9a2c3c0: a(n) OmBlockFileStore
0xbfffc204 I OmDeferrer>sendMessage 0x9a303f8: a(n) OmDeferrer
0xbfffc21c M [] in OmDeferrer>flush 0x9a303f8: a(n) OmDeferrer
0xbfffc23c M BlockClosure>ensure: 0x6f2d0e0: a(n) BlockClosure
0xbfffc260 I OmDeferrer>flush 0x9a303f8: a(n) OmDeferrer
0xbfffc280 I [] in OmDeferrer>runMessageProcess 0x9a303f8: a(n) OmDeferrer
0xbfffc2a0 I [] in BlockClosure>newProcess 0x6e12fb8: a(n) BlockClosure

processes at priority 40
Process�� 0x7f4ae88 priority 40
0xbfff7208 M IdentityDictionary(Dictionary)>at:ifAbsent: 0x6e11fa8: a(n) IdentityDictionary
0xbfff7228 M IdentityDictionary(Dictionary)>at:ifAbsentPut: 0x6e11fa8: a(n) IdentityDictionary
0xbfff7248 M IRBytecodeGenerator>label: 0x6e12050: a(n) IRBytecodeGenerator
0xbfff7264 M IRTranslatorV2>label: 0x6e12118: a(n) IRTranslatorV2
0xbfff7280 M IRTranslatorV2>visitSequence: 0x6e12118: a(n) IRTranslatorV2
0xbfff729c M IRSequence>accept: 0x6e12138: a(n) IRSequence
0xbfff8fa4 M IRTranslatorV2(IRVisitor)>visitNode: 0x6e12118: a(n) IRTranslatorV2
0xbfff8fc0 M [] in IRTranslatorV2(IRVisitor)>visitNodes: 0x6e12118: a(n) IRTranslatorV2
0xbfff8fe4 M SortedCollection(OrderedCollection)>do: 0x6e12248: a(n) SortedCollection
0xbfff9000 M IRTranslatorV2(IRVisitor)>visitNodes: 0x6e12118: a(n) IRTranslatorV2
0xbfff901c M IRTranslatorV2>visitSequences: 0x6e12118: a(n) IRTranslatorV2
0xbfff9038 M IRTranslatorV2>visitMethod: 0x6e12118: a(n) IRTranslatorV2
0xbfff9054 M IRMethod>accept: 0x6e12320: a(n) IRMethod
0xbfff9070 M IRTranslatorV2(IRVisitor)>visitNode: 0x6e12118: a(n) IRTranslatorV2
0xbfff9094 M IRMethod>generateBlock:withScope: 0x6e12320: a(n) IRMethod
0xbfff90b4 M IRMethod>compiledBlock: 0x6e12320: a(n) IRMethod
0xbfff90d4 M OCASTTranslator>translateFullBlock: 0x6e123a8: a(n) OCASTTranslator
0xbfff90f8 M OCASTTranslatorForValue(OCASTTranslator)>visitFullBlockNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff9120 M OCASTTranslatorForValue(OCASTTranslator)>visitBlockNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff913c M RBBlockNode>acceptVisitor: 0x6e12420: a(n) RBBlockNode
0xbfff9158 M OCASTTranslatorForValue(RBProgramNodeVisitor)>visitNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff9174 M OCASTTranslatorForValue(OCASTTranslator)>visitNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff9190 M [] in OCASTTranslatorForValue(OCASTTranslator)>emitMessageNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff91b4 M OrderedCollection>do: 0x6e12480: a(n) OrderedCollection
0xbfff91d0 M OCASTTranslatorForValue(OCASTTranslator)>emitMessageNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff91ec M OCASTTranslatorForValue(OCASTTranslator)>visitMessageNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff9208 M RBMessageNode>acceptVisitor: 0x6e124f8: a(n) RBMessageNode
0xbfff9224 M OCASTTranslatorForValue(RBProgramNodeVisitor)>visitNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff9240 M OCASTTranslatorForValue(OCASTTranslator)>visitNode: 0x6e12450: a(n) OCASTTranslatorForValue
0xbfff925c M [] in OCASTTranslatorForEffect(OCASTTranslator)>emitMessageNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfff9280 M OrderedCollection>do: 0x6e12550: a(n) OrderedCollection
0xbfff929c M OCASTTranslatorForEffect(OCASTTranslator)>emitMessageNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa00c M OCASTTranslatorForEffect>emitMessageNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa028 M OCASTTranslatorForEffect(OCASTTranslator)>visitMessageNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa044 M RBMessageNode>acceptVisitor: 0x6e125c8: a(n) RBMessageNode
0xbfffa060 M OCASTTranslatorForEffect(RBProgramNodeVisitor)>visitNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa07c M OCASTTranslatorForEffect(OCASTTranslator)>visitNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa098 M [] in OCASTTranslatorForEffect>visitSequenceNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa0bc M OrderedCollection>do: 0x6e12668: a(n) OrderedCollection
0xbfffa0d8 M OCASTTranslatorForEffect>visitSequenceNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa0f4 M RBSequenceNode>acceptVisitor: 0x6e126e0: a(n) RBSequenceNode
0xbfffa110 M OCASTTranslatorForEffect(RBProgramNodeVisitor)>visitNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa12c M OCASTTranslatorForEffect(OCASTTranslator)>visitNode: 0x6e12520: a(n) OCASTTranslatorForEffect
0xbfffa148 M OCASTTranslator>visitMethodNode: 0x6e12708: a(n) OCASTTranslator
0xbfffa164 M RBMethodNode>acceptVisitor: 0x6e12780: a(n) RBMethodNode
0xbfffa180 M OCASTTranslator(RBProgramNodeVisitor)>visitNode: 0x6e12708: a(n) OCASTTranslator
0xbfffa19c M OCASTTranslator>visitNode: 0x6e12708: a(n) OCASTTranslator
0xbfffa1bc M RBMethodNode>generateIR 0x6e12780: a(n) RBMethodNode
0xbfffa1d4 M RBMethodNode>generate: 0x6e12780: a(n) RBMethodNode
0xbfffa1f4 M [] in OpalCompiler>compile 0x6e127e8: a(n) OpalCompiler
0xbfffa20c M BlockClosure>on:do: 0x6e12868: a(n) BlockClosure
0xbfffa230 M OpalCompiler>compile 0x6e127e8: a(n) OpalCompiler
0xbfffa250 M AbstractNautilusUI class(Behavior)>recompile:from: 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffa274 M [] in AbstractNautilusUI class(Behavior)>compileAllFrom: 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffa29c M Set>do: 0x6e12970: a(n) Set
0xbfffaf34 M AbstractNautilusUI class(Behavior)>compileAllFrom: 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffaf50 M AbstractNautilusUI class(Class)>compileAllFrom: 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffaf6c M AbstractNautilusUI class(Behavior)>compileAll 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffaf8c I AbstractNautilusUI class(Class)>compileAll 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffafac I AbstractNautilusUI class(Behavior)>recompile 0x7fb08f8: a(n) AbstractNautilusUI class
0xbfffafc4 M [] in SmalltalkImage>recompile 0x74ca9b8: a(n) SmalltalkImage
0xbfffaff8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 0x6e12aa0: a(n) OrderedCollection
0xbfffb01c M OrderedCollection>do: 0x6e12aa0: a(n) OrderedCollection
0xbfffb054 I [] in OrderedCollection(Collection)>do:displayingProgress:every: 0x6e12aa0: a(n) OrderedCollection
0xbfffb078 I BlockClosure>cull: 0x6e12b40: a(n) BlockClosure
0xbfffb094 M [] in Job>run 0x6e12a58: a(n) Job
0xbfffb0b8 M [] in CurrentJob(DynamicVariable)>value:during: 0x72f6dc0: a(n) CurrentJob
0xbfffb0d8 M BlockClosure>ensure: 0x6e12b80: a(n) BlockClosure
0xbfffb104 I CurrentJob(DynamicVariable)>value:during: 0x72f6dc0: a(n) CurrentJob
0xbfffb12c I CurrentJob class(DynamicVariable class)>value:during: 0x7233b28: a(n) CurrentJob class
0xbfffb14c M [] in Job>run 0x6e12a58: a(n) Job
0xbfffb16c M BlockClosure>ensure: 0x6e12c80: a(n) BlockClosure
0xbfffb190 I Job>run 0x6e12a58: a(n) Job
0xbfffb1b0 I MorphicUIManager(UIManager)>displayProgress:from:to:during: 0x9a2c2d8: a(n) MorphicUIManager
0xbfffb1e0 I ByteString(String)>displayProgressFrom:to:during: 0x748c040: a(n) ByteString
0xbfffb214 I OrderedCollection(Collection)>do:displayingProgress:every: 0x6e12aa0: a(n) OrderedCollection
0xbfffb240 I OrderedCollection(Collection)>do:displayingProgress: 0x6e12aa0: a(n) OrderedCollection
0xbfffb268 I SmalltalkImage>recompile 0x74ca9b8: a(n) SmalltalkImage
0xbfffb288 I OpalCompiler class>recompileAll 0x7310170: a(n) OpalCompiler class