gdb ./lmp_kid_openmpi_cuda32_pureGNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-23.el5_5.2)
Copyright (C) 2009 Free Software Foundation, Inc.
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Reading symbols from /nics/d/home/smagg/opt/lammps/lmp_kid_openmpi_cuda32_pure...done.
(gdb) set args -sf cuda < in.shreevant.gpu1.cuda
(gdb) dir ~/proj/wksp-ecl-cpp/2012-02-03-pure-lammps/src/
Source directories searched: /nics/d/home/smagg/proj/wksp-ecl-cpp/2012-02-03-pure-lammps/src:$cdir:$cwd
(gdb) b LAMMPS_NS::Minimize::Minimize
../../gdb/breakpoint.c:6087: internal-error: expand_line_sal_maybe: Assertion `found' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) 

The error is reported just after hitting the Enter key after typing 
b LAMMPS_NS::Minimize::Minimize 

command.

Best,