(gdb) backtrace
#0  0x00000000004095e1 in MyFunction::Evaluate(arma::Mat<double> const&, unsigned long) const ()
#1  0x000000000040d56a in mlpack::optimization::SGD<MyFunction>::Optimize(arma::Mat<double>&) ()
#2  0x8000000000c53134 in ?? ()
#3  0x8000000000000000 in ?? ()
#4  0xbf1e1ddf0f6194c4 in ?? ()
#5  0x800213416a6aaedb in ?? ()
#6  0x8002317e77445ca2 in ?? ()
#7  0x8000000000000000 in ?? ()
#8  0x3eff75104d551d69 in ?? ()
#9  0x0000000000002710 in ?? ()
#10 0x3e112e0be826d695 in ?? ()
#11 0x00007fff00000000 in ?? ()
#12 0x00007ffff7ffe1c8 in _r_debug ()
#13 0x0000003a00000003 in ?? ()
#14 0x00000000000000ae in ?? ()
#15 0x000000000062b460 in ?? ()
#16 0x00000000f63d4e2e in ?? ()
#17 0x0000000000000000 in ?? ()
(gdb) frame 0