QtCreator Help

Clicking "Help" icon with or without project opened (on Linux):

[286803.338555] traps: qtcreator[28649] trap int3 ip:7fb57e4df401 sp:7fb529c7db50 error:0
[286830.013880] traps: qtcreator[28692] trap int3 ip:7f804a2b5401 sp:7f7ff73feb50 error:0
[286854.466030] traps: qtcreator[28733] trap int3 ip:7f61b682d401 sp:7f61637feb50 error:0

Then I did Tools->Options->Help and figured that I have list there "autodetect" of many versions of everything since 5.1. When I cleared most till 5.9 help mode worked. 

So it seems it was leftovers from system updated. It could be great there to have a button which validates (and maybe 1 more button, which clears all and does full fresh autodetect) all listed entries and removes anything already absent on file system (because of sys upgrade or so). Currently it took more then 10 minutes to clean stuff.

Also since I added "cppreference.com" (maybe just bad luck on that), pressing F1 in editor may do cursor as infinite busy, can be solved only by restarting creator.