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Message-ID:	<578E70AF.2010205@xs4all.nl>
Date:	Tue, 19 Jul 2016 20:25:51 +0200
From:	"Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] pcb: polygon "twin hole" bug
References:	<alpine DOT DEB DOT 2 DOT 00 DOT 1607070651120 DOT 7286 AT igor2priv> <4f9dfd62-45cd-a307-a6d9-93b7cd4333a2 AT gmail DOT com>
In-Reply-To:	<4f9dfd62-45cd-a307-a6d9-93b7cd4333a2@gmail.com>
Reply-To:	geda-user AT delorie DOT com

Charles Repetti (charlie94965 AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> Confirmed.
>
> - Charlie
>
>
> On 7/6/16 10:01 PM, gedau AT igor2 DOT repo DOT hu wrote:
>> Hi all,
>>
>> Evan found a bug in pcb-rnd which turned out to be a bug in mainline 
>> as well. It is really easy to reproduce from scratch:
>>
>> 1. draw a poly
>> 2. draw a hole in it (strange: first click ignored?)
>> 3. keep on drawing the second hole (strange: marker is not moved?)
>> 4. bug: the poly of step 1 is duplicated (copied in place), and the 
>> new hole is created on the new poly
>>
>> Important: do not switch tool between step 2 and 3! This, together 
>> with the fact that it can be reproduced with both HIDs suggests it's 
>> a bug in core (the strangenesses are maybe related to handling of the 
>> mode variable, I have no idea how the poly gets dupped).
>>
>> Detecting the duplication polys:
>>
>> - save before and after step 4, compare the two save files; instead 
>> of one poly object with two holes there are two poly objects with one 
>> hole each
>>
>> - move the poly after step 4; expected: moving one poly; what happens 
>> instead: moving the top poly, leaving the bottom poly in place
>>
>> - in step 3 draw the second hole so that it has an intersection with 
>> the first; that intersection is the only copper hole at the end, 
>> because it is not covered by any of the polygons
>>
>> In pcb-rnd I am still knee-deep in the conf rewrite, but I plan to 
>> look at this bug after I finish. In case someone debugs this in 
>> mainline, I'm interested in the result. Else I can share my 
>> findings/patches when I get to it, so mainline developers can fix 
>> this in mainline.
>>
>> Regards,
>>
>> Igor2
>>
>>
>
>
Hi all,

Bug report filed:

https://bugs.launchpad.net/pcb/+bug/1604524

Kind regards,

Bert Timmerman.

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