http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54405
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-09-06 09:05:23 UTC --- It happened because gfortran >= 4.6 uses this function and GDB cannot reverse-step-over such jmp-only function. (gdb) disass _gfortran_transfer_real_write Dump of assembler code for function _gfortran_transfer_real_write: 0x00007ffff7b9f930 <+0>: jmpq 0x7ffff7ae0a30 <_gfortran_transfer_real@plt> End of assembler dump.