You need to set QT_ASSUME_STDERR_HAS_CONSOLE=1 environment variable. This is needed
because Qt in Fedora is configured that way that when application is run not from console
(e.g. from applications launcher) it will send QDebug output to journald instead of
stderr. However for some reason when app is run from Qt Creator it doesn't recognise
Qt Creator's "application output" redirection plugin as console so this
variable is needed. You can set it in environment settings in Qt Creator's
"Kits" settings.