[Dr. Geo] [Bug 2020185] Re: Crash when very long lines

[hilaire]

When simulating exponential growth, drawing positions can be crazy. 
I implemented detecting for those situations with point and polyline objects 
(segment, ray, polygon, locus, etc). so this "Chaotic sequence" Smalltalk 
sketch pass.

It should be implemented for circle,  arc and angle too.

** Changed in: drgeo
       Status: New => In Progress

** Changed in: drgeo
     Assignee: (unassigned) => hilaire (hilaire-fernandes)

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https://bugs.launchpad.net/bugs/2020185

Title:
  Crash when very long lines

Status in Dr. Geo:
  In Progress

Bug description:
  With the Smalltalk Sketch "Chaotic Sequence", modifying the code as
  bellow:

  n / 5 @ (2 * r value * value * (1 - value))

  makes the VM to hangs and optionnaly to crash. Then the terminal shows
  this repeated list of messages:

  Object>>#shallowCopy
  BitBlt>>#copyBits
  BitBlt>>#copyBits
  BitBlt>>#copyBits
  BitBlt>>#copyBits
  BitBlt>>#copyBits
  Object>>#shallowCopy
  BitBlt>>#copyBits

  stack page bytes 8192 available headroom 5576 minimum unused headroom
  5832

        (Segmentation fault)
  Abandon (core dumped)

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