We appreciate the bug reports that players send us, but unfortunately we do not distribute the Debugger’s Beret anymore—sorry. The White Hat is still available for security exploits (particularly those affecting servers).
Although there is no in-game item given to players who report bugs, you can often see players credited in our patch notes for reporting fixes. E.g., there’s several users credited in our latest patch notes: 3.24.5.1 Patch Notes