QGIS » QGIS Application

Click "add a new field", set its "precision", "length" and "type"

Select this field and click "delete selected field"

Click "Add a new field" again

Double on "name" and this Python error appears:

An error has occured while executing Python code:

Traceback (most recent call last):
File "/usr/share/qgis/python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py", line 137, in data
return self.fieldTypes[value]
KeyError: None

Python version:
2.7.6 (default, Mar 22 2014, 23:03:41)
[GCC 4.8.2]

QGIS version:
2.7.0-Master Master, exported

Python path: ['/usr/share/qgis/python/plugins/processing', '/home/fd/.qgis2/python/plugins/processinglwgeomprovider', '/home/fd/.qgis2/python/plugins/LecoS', '/usr/share/qgis/python', u'/home/fd/.qgis2/python', u'/home/fd/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode', u'/home/fd/.qgis2//python', '/usr/share/qgis/python/plugins/fTools/tools', '/home/fd/.qgis2/python/plugins/MetaSearch/ext-libs']