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[Dr. Geo] [Bug 2020185] Re: Crash when very long lines
From: |
hilaire |
Subject: |
[Dr. Geo] [Bug 2020185] Re: Crash when very long lines |
Date: |
Sat, 20 May 2023 09:00:06 -0000 |
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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