<div dir="ltr">Playing with my son we opened many Sample04Pacman morphs and moving one of them over the others we got the Squeak 5.0 VM to become unresponsive. <br><br><img src="cid:ii_lteqoi6y0" alt="Screenshot 2024-03-05 at 19.04.31.jpg" width="542" height="285"><br><br>Sampling the VM, shows the copyBitsLockedAndClipped as the possible culprit. <br><br><font face="monospace">Analysis of sampling Squeak (pid 3794) every 1 millisecond<br>Process:         Squeak [3794]<br>Path:            /Users/USER/*/CuisVM.app/Contents/MacOS/Squeak<br>Load Address:    0x10af30000<br>Identifier:      org.squeak.Squeak<br>Version:         5.20231218.1441 (5.20231218.1441)<br>Code Type:       X86-64<br>Platform:        macOS<br>Parent Process:  bash [3793]<br><br>Date/Time:       2024-03-05 18:45:03.504 +0000<br>Launch Time:     2024-03-05 18:33:54.919 +0000<br>OS Version:      macOS 14.3.1 (23D60)<br>Report Version:  7<br>Analysis Tool:   /usr/bin/sample<br><br>Physical footprint:         4.1G<br>Physical footprint (peak):  4.1G<br>Idle exit:                  untracked<br>----<br><br>Call graph:<br>    2129 Thread_5154206   DispatchQueue_1: com.apple.main-thread  (serial)<br>    + 1437 start  (in dyld) + 1942  [0x7ff80df99386]<br>    + ! 1437 NSApplicationMain  (in AppKit) + 816  [0x7ff8119d41c1]<br>    + !   1437 -[NSApplication run]  (in AppKit) + 603  [0x7ff811a001b2]<br>    + !     1437 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]  (in AppKit) + 1304  [0x7ff812318804]<br>    + !       1437 _DPSNextEvent  (in AppKit) + 880  [0x7ff811a0ec39]<br>    + !         1437 _BlockUntilNextEventMatchingListInModeWithFilter  (in HIToolbox) + 66  [0x7ff818cf0531]<br>    + !           1437 ReceiveNextEventCommon  (in HIToolbox) + 201  [0x7ff818cf0616]<br>    + !             1437 RunCurrentEventLoopInMode  (in HIToolbox) + 292  [0x7ff818cf09d9]<br>    + !               1437 CFRunLoopRunSpecific  (in CoreFoundation) + 557  [0x7ff80e3fe082]<br>    + !                 1437 __CFRunLoopRun  (in CoreFoundation) + 850  [0x7ff80e3fe99c]<br>    + !                   1437 __CFRunLoopDoObservers  (in CoreFoundation) + 493  [0x7ff80e3ff41a]<br>    + !                     1437 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__  (in CoreFoundation) + 23  [0x7ff80e3ff4f6]<br>    + !                       1437 __NSFirePerformWithOrder  (in Foundation) + 357  [0x7ff80f4583fc]<br>    + !                         1437 -[sqSqueakMainApplication runSqueak]  (in Squeak) + 381  [0x10afceb33]<br>    + !                           1437 interpret  (in Squeak) + 867  [0x10af37bf1]<br>    + !                             995 ???  (in <unknown binary>)  [0x116c063e8]<br>    + !                             : 988 primitiveCopyBits  (in Squeak) + 39  [0x10afdf1e7]<br>    + !                             : | 988 copyBits  (in Squeak) + 42  [0x10afded28]<br>    + !                             : |   988 copyBitsLockedAndClipped  (in Squeak) + 2867,2861,...  [0x10afe2799,0x10afe2793,...]<br>    + !                             : 4 primitiveCopyBits  (in Squeak) + 29  [0x10afdf1dd]<br>    + !                             : | 2 loadBitBltFromwarping  (in Squeak) + 538,695  [0x10afe5c25,0x10afe5cc2]<br>    + !                             : | 1 loadBitBltFromwarping  (in Squeak) + 214  [0x10afe5ae1]<br>    + !                             : | + 1 isPointers  (in Squeak) + 0  [0x10af5cc4b]<br>    + !                             : | 1 loadBitBltFromwarping  (in Squeak) + 1885  [0x10afe6168]<br>    + !                             : |   1 isWordsOrBytes  (in Squeak) + 17  [0x10af5cd22]<br>    + !                             : 1 primitiveCopyBits  (in Squeak) + 61  [0x10afdf1fd]<br>    + !                             : | 1 statNumGCs  (in Squeak) + 18  [0x10af62047]<br>    + !                             : 1 primitiveCopyBits  (in Squeak) + 111  [0x10afdf22f]<br>    + !                             : | 1 showDisplayBitsLeftTopRightBottom  (in Squeak) + 47  [0x10af676da]<br>    + !                             : 1 primitiveCopyBits  (in Squeak) + 175  [0x10afdf26f]<br>    + !                             :   1 methodReturnReceiver  (in Squeak) + 1  [0x10af64819]<br>    + !                             96 ???  (in <unknown binary>)  [0x116c13a94]<br>    + !                             : 60 primitivePerform  (in Squeak) + 267  [0x10af6b8d8]<br>    + !                             : | 36 executeNewMethod  (in Squeak) + 91  [0x10af4ac77]<br>    + !                             : | + 23 slowPrimitiveResponse  (in Squeak) + 121  [0x10af7b65f]<br>    + !                             : | + ! 5 primitiveSmallFloatAdd  (in Squeak) + 0,23,...  [0x10af75afc,0x10af75b13,...]<br>    + !                             : | + ! 5 primitiveSmallFloatDivide  (in Squeak) + 181,0,...  <br></font><div><br></div></div>