Bug report #15077
Disable "Add circular string..." tools for temporary layer
|Affected QGIS version:||2.14.3||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||not reproducable|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||23020|
Toggle to edition a line or polygon temporary layer
Try to add new feature using one of the "Add circular string..." tools.
When validating your geometry, it's cleared. If you combined with the simple "add feature" tool when constructing the geometry, the curved part is modified to a straight line and sometimes QGIS may complain about a self-intersection (generated by its own modification)
I think that, if it's normal that temporary layer doen't allow supports curves then these circular tools should not be available. And more generally, if provider doesn't support curves, better disable the tools.