[QGIS-Developer] Backporting crash handler into 2.18

[Patrick Dunford]

I currently use 2.18 to work around some bugs in 3.0, and it is possible 
even with the difference in project file formats as there is enough 
compatibility. Although lately the CRS translation has been broken when 
opening a 3.0 project in 2.18 and I have been told there is no 
guaranteed backwards compatibility.

Personally I would advocate for engineering a little bit of backporting 
into 2.18 to allow it to recognise the CRS from the project file which 
is currently challenging, as it seems to be able to recognise everything 
else well enough to be able to view a map on opening the project file 
and I have done this many times while running the development masters on 
my live maps during the past year or so.

The main thing that is not translated is layer styles and whilst this is 
a big part at the moment I can work around that well enough to not make 
a big issue out of that which would probably be a much more significant 
effort to backport.

As it stands, 2.18 will be maintained as the last version LTR for many 
years yet until 3.2 is released and we haven't even got to 3.0 yet. In 
fact I do have some doubt that the 3.0 release date is going to be met 
(but of course I have no real insight into the process so it is just an 
informed opinion at best)


On 05/12/17 05:06, Larry Shaffer wrote:
> Hi,
>
> On Mon, Dec 4, 2017 at 2:00 AM, Richard Duivenvoorde 
> <rdmailings at duif.net <mailto:rdmailings at duif.net>> wrote:
>
>     On 04-12-17 01:01, Nathan Woodrow wrote:
>     > Hey all,
>     >
>     > Just wanted to see how everyone would feel if I was thinking about
>     > backporting the crash handler we have in QGIS 3 back into 2.18.
>
>
> + 1 from me.
>
>     I think it is a good idea...
>
>     As you say, 2.18 will be here for some time (especially for
>     educational
>     and governmental institutions probably, all running windows).
>
>
> This is certainly true and a clear justification for the backport. 
> Those enterprises may keep using QGIS 2.18, possibly up to a year from 
> now (with respect to next LTR release and adoption), or longer. 
> Horrifying to consider, but at least this crash handler will help.
>
>     Indeed then people can at least report back something (as I think our
>     normal stacktrace-sources: Linux devs, will probably move on to 3.x).
>
>     While it looks like if we want to say that QGIS ever crashes on
>     Windows,
>     maybe name it Windows or Data Crash Handler  ;-) ....
>
>     Needs to be tested thoroughly though, as it is a new 'feature' in
>     LTR...
>     Is it testable?
>
>     Regards,
>
>     Richard
>
>
>
> Larry Shaffer
> Dakota Cartography
> Black Hills, South Dakota
> ----------------------------------
> Boundless Desktop and QGIS Support/Development
> Boundless Spatial - http://boundlessgeo.com
> lshaffer at boundlessgeo.com <mailto:lshaffer at boundlessgeo.com>
>
> On Mon, Dec 4, 2017 at 4:21 AM, Tom Chadwin <tom.chadwin at nnpa.org.uk 
> <mailto:tom.chadwin at nnpa.org.uk>> wrote:
>
>     A huge +1 from me - as a Windows user, it's frustrating not to be
>     able to
>     investigate the occasional times PyQGIS causes a Windows minidump.
>
>     Tom
>
>
>
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