SwiiftUI crash: AG::data::table::grow_region()

I am adding a small SwiftUI view to my NSTableViewCell, using NSHostingView. Occasionally (randomly) I get this crash in the debugger, but I don't understand what it means:

Code Block
#0 0x00007fff4309ace6 in AG::data::table::grow_region() ()
#1 0x00007fff4309b155 in AG::data::table::alloc_page(AG::data::zone&, unsigned int) ()
#2 0x00007fff4309b430 in AG::data::zone::alloc_slow(unsigned int, unsigned int) ()
#3 0x00007fff430a1bad in AG::Graph::add_attribute(AG::Subgraph&, unsigned int, void const*, void const*) ()
#4 0x00007fff430b87fe in Attribute.init<τ_0_0>(body:value:flags:update:) ()
#5 0x00007fff42e8da29 in GraphHost.Data.init() ()
#6 0x00007fff4273e532 in ViewGraph.init<τ_0_0>(rootViewType:requestedOutputs:) ()
#7 0x00007fff4273e3be in ViewGraph.__allocating_init<τ_0_0>(rootViewType:requestedOutputs:) ()
#8 0x00007fff42d795d6 in NSHostingView.init(rootView:) ()
#9 0x00007fff42d785dd in NSHostingView.__allocating_init(rootView:) ()
#10 0x00000001036494ff in ContactsCountIconsInterface.makeContactsCountView() at /Users/z/Documents/Git/branches/SimpleList/Mac/ContactsCountIconsInterface.swift:23
#11 0x0000000103649558 in @objc ContactsCountIconsInterface.makeContactsCountView() ()
#12 0x000000010347ed1a in -[ContactDataCellView setupIconsCountViewWithCountForLogsCount:todosCount:filesCount:] at /Users/z/Documents/ContactsJournalGit/branches/SimpleList/ContactDataCellView.m:40
#13 0x0000000103445f88 in -[MacContactsViewController outlineView:viewForTableColumn:item:] at /Users/z/Documents/ContactsJournalGit/branches/SimpleList/Mac/MacContactsViewController.m:745
#14 0x00007fff22dde8b5 in -[NSTableView(NSTableViewViewBased) makeViewForTableColumn:row:] ()
#15 0x00007fff22dddf03 in -[NSTableRowData _addViewToRowView:atColumn:row:] ()
#16 0x00007fff22dddc38 in -[NSTableRowData _addViewsToRowView:atRow:] ()
#17 0x00007fff22ddbf41 in -[NSTableRowData _initializeRowView:atRow:] ()
#18 0x00007fff22dda3d3 in -[NSTableRowData _preparedRowViewForRow:storageHandler:] ()
#19 0x00007fff22dda21e in -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] ()
#20 0x00007fff22dda034 in -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] ()
#21 0x00007fff22dd8f2a in -[NSTableRowData _updateVisibleRowEntries] ()
#22 0x00007fff236dedbb in __59-[NSTableRowData _automaticRowHeightsUpdateVisibleRowViews]_block_invoke.1371 ()
#23 0x00007fff22fff21b in -[NSTableRowData _keepTopRowStable:andDoWorkUntilDone:] ()
#24 0x00007fff22ffeff8 in -[NSTableRowData _automaticRowHeightsUpdateVisibleRowViews] ()
#25 0x00007fff22dd8873 in -[NSTableRowData updateVisibleRowViews] ()
#26 0x00007fff22f089da in -[NSTableRowData prepareContentInRect:] ()
#27 0x00007fff22f0896f in -[NSTableView prepareContentInRect:] ()
#28 0x00007fff22f086d6 in __38-[NSView _pullInExtraTilesForOverdraw]_block_invoke ()
#29 0x00007fff22f07fd2 in -[NSView _performWorkOnTilesFromRect:renderedContentRect:maximumRect:scrollVelocity:handler:] ()
#30 0x00007fff22f07767 in -[NSView _pullInExtraTilesForOverdraw] ()
#31 0x00007fff22f073ef in -[NSView _doIdlePrefetch] ()


Can anyone comment on how to decipher this crash?
SwiiftUI crash: AG::data::table::grow_region()
 
 
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