Hi,

I got a few times the following crash while using the latest Pharo 64 bit image (Pharo64-60513) with the latest vm (pharo-mac-x86_64-201710101955-47390dc) on Mac OS. The image is around 3.5GB when the crash happens.��

Attached is a crash report containing the reports for three crashes.

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Segmentation fault
0�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac13ad8 fixFollowedFieldofObjectwithInitialValue + 33
1�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac8f64e reportStackState + 884
2�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac8f984 sigsegv + 155
3�� ��libsystem_platform.dylib�� �� �� �� �� �� 0x00007fff934dff1a _sigtramp + 26
4�� ��???�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x0000000000000000 0x0 + 0
5�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac2d8a1 markAndTrace + 858
6�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac2a584 markObjects + 464
7�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac29d6c fullGC + 72
8�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac49df8 primitiveFullGC + 45
9�� ��Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac09445 interpret + 26715
10�� Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac13816 enterSmalltalkExecutiveImplementation + 152
11�� Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac02e8c interpret + 674
12�� Pharo�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��0x000000010ac90cd1 -[sqSqueakMainApplication runSqueak] + 394
13�� Foundation�� �� �� �� �� �� �� �� �� �� �� �� �� 0x00007fff8ecb0641 __NSFirePerformWithOrder + 326
14�� CoreFoundation�� �� �� �� �� �� �� �� �� �� �� 0x00007fff87892127 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
15�� CoreFoundation�� �� �� �� �� �� �� �� �� �� �� 0x00007fff87892080 __CFRunLoopDoObservers + 368
16�� CoreFoundation�� �� �� �� �� �� �� �� �� �� �� 0x00007fff87884188 __CFRunLoopRun + 872
17�� CoreFoundation�� �� �� �� �� �� �� �� �� �� �� 0x00007fff87883bd8 CFRunLoopRunSpecific + 296
18�� HIToolbox�� �� �� �� �� �� �� �� �� �� �� �� �� ��0x00007fff88ffd56f RunCurrentEventLoopInMode + 235
19�� HIToolbox�� �� �� �� �� �� �� �� �� �� �� �� �� ��0x00007fff88ffd1ee ReceiveNextEventCommon + 179
20�� HIToolbox�� �� �� �� �� �� �� �� �� �� �� �� �� ��0x00007fff88ffd12b _BlockUntilNextEventMatchingListInModeWithFilter + 71
21�� AppKit�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� 0x00007fff8d56c8ab _DPSNextEvent + 978
22�� AppKit�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� 0x00007fff8d56be58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
23�� AppKit�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� 0x00007fff8d561af3 -[NSApplication run] + 594
24�� AppKit�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� 0x00007fff8d4de244 NSApplicationMain + 1832
25�� libdyld.dylib�� �� �� �� �� �� �� �� �� �� �� ��0x00007fff8ea3a5c9 start + 1


Smalltalk stack dump:
�� �� 0x7fff54ff9fb0 I SmalltalkImage>garbageCollect 0x11317f1c8: a(n) SmalltalkImage
�� �� 0x7fff54ff9ff8 I Array class(Behavior)>handleFailingBasicNew: 0x112d62738: a(n) Array class
�� �� 0x7fff54ffa038 M Array class(Behavior)>basicNew: 0x112d62738: a(n) Array class
�� �� 0x7fff54ffa070 M Array class>new: 0x112d62738: a(n) Array class
�� �� 0x7fff54ffa0b0 M OrderedCollection>growAtLast 0x11235e740: a(n) OrderedCollection
�� �� 0x7fff54fe4948 M OrderedCollection>makeRoomAtLast 0x11235e740: a(n) OrderedCollection
�� �� 0x7fff54fe4978 M OrderedCollection>addLast: 0x11235e740: a(n) OrderedCollection
�� �� 0x7fff54fe49b0 M [] in OrderedCollection>addAllLast: 0x11235e740: a(n) OrderedCollection
�� �� 0x7fff54fe49f8 M OrderedCollection>do: 0x176a416e8: a(n) OrderedCollection
...
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Cheers,
Andrei