std::cin in Fiasco/L4Re (with 'make qemu')

How do I use std::cin in Fiasco/L4Re? The software compiles and links fine, only during execution (with 'make qemu'), this crashes it: Global_Scheduler::Global_Scheduler (bool read_from_file) : period_left(0), number_of_schedulers(0) { if (not read_from_file) { std::cout << "Global scheduler period: "; std::cin >> period; // ... There is no error, but there is no halt to execution (to wait for input), and the value "read" (to period) is inconsistent. -- underground experts united: http://user.it.uu.se/~embe8573