Apart from being undesirable that debugging messages are always written to stdout, the information is redundant as a similar message is logged at debug level. #12681
The default is 'true'. When set 'false', file: and qrc: URLs are treated as invalid (unknown scheme) rather than opening local files, as requested in issue #12752. In order to test this, I added a mechanism to test/run-tests.py allowing individual tests to be annotated with command-line options to pass to phantomjs or the script.