Fix test migration crash waiting to happen due to inferred relations Avoid crashing when a relation definition which is already known (due to being inferred) gets explicitly added. As explained in a comment, this would deserve more thinking, but at least this fixes a test failure with computed relations.

     1

import ConfigParser

     2

try:

     3

    undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)

     4

except ConfigParser.NoOptionError:

     5

    pass # this conf. file was probably already migrated

     6

else:

     7

    config.global_set_option('undo-enabled', bool(undo_actions))