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    Hi Francisco,<br>
    <br>
    Can you reproduce the problem consistently? How?<br>
    <br>
    Thanks,<br>
    <br>
    On 3/5/2024 4:11 PM, Francisco Garau via Cuis-dev wrote:
    <blockquote
cite="mid:CAKAN0GfG=XaZbvQBKVXRTOWV5Vc2Sg3tWEEmjLPxtu9xDY=8rQ@mail.gmail.com"
      type="cite">
      <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>
        ...<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>
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        </div>
      </div>
    </blockquote>
    <br>
    <br>
    <pre class="moz-signature" cols="72">-- 
Juan Vuletich
cuis.st
github.com/jvuletich
researchgate.net/profile/Juan-Vuletich
independent.academia.edu/JuanVuletich
patents.justia.com/inventor/juan-manuel-vuletich
linkedin.com/in/juan-vuletich-75611b3
twitter.com/JuanVuletich</pre>
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