Pike v7.5 release 3 running Hilfe v3.5 (Incremental Pike Frontend)

array_sscanf("hej", "%[\x6dd\x70f\x780]");

Overlapping ranges in sscanf not supported. HilfeInput:1: HilfeInput()->___HilfeWrapper()

Sorry? Where is the range, and what is it overlapping with? If I remove either of the three characters from the set, the code works...