qgis crashes when using the "merge selected features" tool

[qgib]

Author Name: Gerhard Spieles (Gerhard Spieles)
Original Redmine Issue: 2342

Redmine category:digitising
Assignee: Marco Hugentobler

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Hello,

tried to union the marked obejcts in a vector layer.
The function start and near 98% done, qgis crash.

When I reduce the amount of the marked objects, function show 100% is done, but when I will save the changes in the layer, qgis crash.

A screenshot is attached

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• unionobjektsfail.jpg (Gerhard Spieles)
• vereinigungsshape.zip (Gerhard Spieles)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Can you please post a sample of the problematic data to try reproduce the problem locally? Thanks.

[qgib]

Author Name: Gerhard Spieles (Gerhard Spieles)

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Replying to [comment:1 lutra]:

Can you please post a sample of the problematic data to try reproduce the problem locally? Thanks.

zip file with datas is attached

[qgib]

Author Name: Giovanni Manghi (@gioman)

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The terminal returns

ERROR 1: [[TopologyException]]: found non-noded intersection between 2.5578e+06 5.52369e+06, 2.5578e+06 5.52369e+06 and 2.5578e+06 5.52369e+06, 2.55779e+06 5.52369e+06 2.5578e+06 5.52369e+06
Segmentation fault

[qgib]

Author Name: Marco Hugentobler (@mhugent)

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Fixed in a8ce63c (SVN r12674). QGIS now shows a message box if there was an error in the merge operation (instead of crashing).

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• status_id was changed from Open to Closed
• resolution was changed from to fixed

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Thanks Marco.

I noticed that the "check geomtery validity" tool does not returns any topology error when used in the attached vector. This way the user has no clue why the merge fails.

[qgib]

Author Name: Gerhard Spieles (Gerhard Spieles)

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Hello,
Befor I opened this new ticket, i had first tested the attached vectorlayer also with ftools "check geometrie" and it was ok.
The problematic object in the layer seems to be nr 97 (97 in the dbf, field NR.)You can@t merge it with other objects.

Gerhard