~ $ cat a.cpp #include <vector> int main() { std::vector<int> v; v.reserve(1ULL<<32); } ~ $ g++ a.cpp ~ $ sudo sh -c 'echo 0 > /proc/sys/v

~ $ cat a.cpp #include <vector> int main() { std::vector<int> v; v.reserve(1ULL<<32); } ~ $ g++ a.cpp ~ $ sudo sh -c 'echo 0 > /proc/sys/vm/overcommit_memory' ~ $ ./a.out terminate called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc Aborted (core dumped) ~ $ sudo sh -c 'echo 1 > /proc/sys/vm/overcommit_memory' ~ $ ./a.out ~ $