[QGIS-Developer] QGIS Unexpectedly Crashing

[Greg Troxel]

"Catania, Luke A ERDC-RDE-GRL-VA CIV via QGIS-Developer"
<qgis-developer at lists.osgeo.org> writes:

> What causes an access violation intermittently?  Once it happens
> sometimes it continues to happen, and I have to delete the QGIS
> directory in AppData\Roaming\ which is annoying because I have my
> plugin there and I need to copy it to another directory and then copy
> it back after running QGIS for first time to have the directory
> recreated.
>
> It seems to be happening with pyqtgraph\Qt.py which is not my code.

What do you mean "have to delete"?  Are you saying that after you see
this error once, then even if you exit qgis, shutdown the OS and power
down the computer and then restart, you will immediately get it again?

I suspect one of several things:

  - your computer has a hardware problem.  I'd suggest running memory
    diagnostics.

  - there's a bug someplace in the C code that python calls.  this seems
    unlikely as you are the first to report that I know of, but OTOH
    every reported bug has a first reporter

  - you are running out of RAM and some malloc call is failing and
    returning NULL and this is not caught

  - as always, something else