[MacRuby-devel] Failure with outlineView data source

[Malcolm F]

I'm getting crashes using an outlineView data source fed by an array of numbers. The crash happens after fiddling around in the view, usually after some variable small delay. Upon crash, the debugger is always stopped in 'class_getSuperclass'.

The crash only happens using Integers or Floats over 12.

I've simplified it down to this sparse MyDocument class that can be put into a document-based app. Put an outline view into MyDocument.xib and connect the datasource delegate to MyDocument.

I'm new at this, so if an experienced MacRubyist can show me what I'm doing wrong, I will be very grateful.
thanks, m

<<code snippet start>>
class MyDocument < NSDocument
  attr_accessor :dataSourceArray
  
  def init
    super
    if (self != nil)
      # Add your subclass-specific initialization here.
      # If an error occurs here, return nil.
    end
    self
  end
  
  def awakeFromNib
    #@dataSourceArray = [1,2,3,4,5,6,7,8,9,10,11,12] #survives
    @dataSourceArray = [1,2,3,4,5,6,7,8,9,10,11,12,13] #crashes, anything over 12
    
    #@dataSourceArray = [0.to_i,8.to_i,116.to_i,224.to_i,400.to_i,1000.to_i] #crashes
    #@dataSourceArray = 13.0 #float also crashes
    #@dataSourceArray = [10]  #survives
    #@dataSourceArray = [99] #crashes
    #@dataSourceArray = 99 #crashes
    #@dataSourceArray = 9 #survives
    #@dataSourceArray = [NSNumber.numberWithInt(99)] #crashes
    #@dataSourceArray = Array.new [117] #crashes
    #@dataSourceArray = [1,2,3,4,[5,6],7,8,9,0] #survives
    #@dataSourceArray = [0,8,116,224,400,1000] #crashes
    #@dataSourceArray = [0.to_s,8.to_s,116.to_s,224.to_s,400.to_s,1000.to_s] #survives
    #@dataSourceArray = [:zero,:eight,:onesixteen,:twotwentyfour,:fourhundred,:hundredyoh] #survives
  end
  
  def windowNibName
   "MyDocument"
  end

  ################## DataSource for OV #######################
  def outlineView(outlineView, numberOfChildrenOfItem:item)
    if item.is_a? Array
      return item.count
    end
    1
  end
  def outlineView(outlineView, isItemExpandable:item)
    (item == nil) || ((item.is_a? Array) && (item.count > 0))
  end
  def outlineView(outlineView, child:index, ofItem:item)
    #returns child item objects
    if item == nil
      return @dataSourceArray #root item
    end
    if item.is_a? Array
      return item[index]
    end
    return nil
  end
  def outlineView(outlineView, objectValueForTableColumn:tableColumn, byItem:item)
    # returns the object represented by the column at this item
    item.to_s
  end
  
end

<<code snippet end>>