[Qgis-developer] Re: [GRASS5] QGIS GRASS digitizer new crash

Maciek Sieczka werchowyna at epf.pl
Wed Aug 17 03:12:07 EDT 2005

From: "Daniel Calvelo Aros" <dcalvelo at minag.gob.pe>

> From: "Maciek Sieczka" <werchowyna at epf.pl>

>> Due to some modification in Grass 6.1, which took place between 
>> 25.07.2005
>> and 13.08.2005, QGIS GRASS digitizer plugin crashes in a situation
>> it used to handle fine in the past. When a vector file's datatable
>> is edited, which contains some numerical column *and* a character
>> column, and only the numerical attribute is filled by the user,
>>  while the character column entry he leaves empty, QGIS crashes in a
>> following way:
>> QgsGrassEdit::displayDynamic Points = 0x85bacb8 type = 0
>> QgsGrassEdit::displayDynamic Points = 0 type = 0
>> No DB record
>> updated line = 14
>> node = 27 mNodeSymb = 12
>> node = 28 mNodeSymb = 12
>> QObject::connect: No such signal QTabWidget::void
>> currentChanged(QWidget*) QObject::connect:  (sender name:
>>  'tabCats') QObject::connect:  (receiver name:
>> 'QgsGrassAttributesBase') Value: 14 Value: dbmi: Protocol error
>> Broken pipe

> Hi, Maciek. This is probably my fault, as it manifests itself in the dbf
> driver, and I've been seriously tweaking that between the dates you 
> mention.
> Have you got any idea of where in the QGIS code the update is triggered?

I completely useles here, sorry. Radim?

> I'm pretty sure this is a problem with interpreting an update statement.
> Also, what does an empty char column stand for? NULL? 0-length string ""?

I don't know what blank char entry is filled with indeed. The funny thing is 
that QGIS crashes only when I leave the char column blank but fill the 
numerical entry. If I leave both blank, all is OK.


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