I just tried with master (From heads/master@v6-09-02-1734-g73b3cb1, Jul 20 2017, 12:50:37) under Ubuntu 16.04 - it works!
So I found a problem that only occurs in <=6.10.x with a certain stdlibc++. Is is already fixed - either when updating stdlibc++ or ROOT. Good, no action item needed!
Super super side node: I was looking at Building ROOT from source - ROOT where it is listed as OFF by default. 