The following one-liner gives an infinite loop:

#include <cstdio>
#include <initializer_list>
int main() {
    for(int x : {10,20,30}) std::printf("x=%d\n", x);
}

The issue is that std::initializer_list<T>::_Last gets populated with the size of the list (3 in this case) rather than 
with the end pointer.  In other words, g++ sets _Last=3 whereas it should be _Last=_First+3.

There is a workaround:

#include <cstdio>
#include <cstddef>
#include <initializer_list>

template <typename T>
std::initializer_list<T> foo(const std::initializer_list<T> &il) {
#if __QNX__
	if(il.end() < il.begin()) {
		return std::initializer_list<T>(il.begin(), std::size_t(il.end()));
	} else {
		return il;
	}
#else
	return il;
#endif
}

int main() {
	for(int x : foo({3,1,4,1,5,9})) {
		std::printf("x=%d \n", x);
	}
    return 0;
}