On 12 June 2014 13:15, Christoph Mathys wrote: >> If you compile with -D_GLIBCXX_DEBUG there will be an assertion. > > Thanks for the hint. I presume it is still true that I have to compile > every c++library I use with this option as well? ([0]) https://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode_using.html#debug_mode.using.mode