Comment #6 on issue 736 by pekka.klarck: Uncatchable syntax errors should be turned into normal failures when possible
http://code.google.com/p/robotframework/issues/detail?id=736
This issue was updated by revision 85735c360574. Now also ConnectionCache uses RuntimeError instead of DataError. As a result libraries using ConnectionCache may be affected. Only library distributed with Robot that uses ConnectionCache is Telnet and I already checked it is not affected. Still need to look how SeleniumLibrary and SSHLibrary use it.