Program received signal SIGFPE: Floating-point exception - erroneous arithmetic operation.

Backtrace for this error:
#0  0x15555459d7a2 in ???
#1  0x15555459c935 in ???
#2  0x15555384e5af in ???
#3  0x6aa150 in my_getrs1
	at /mnt/ceph/users/pmocz/mesa-git-tests/tmp.XRuRWdYM61/star/mtx_solve_routines.inc:234
#4  0x6aa150 in dense_solve1
	at private/star_bcyclic.f90:916
#5  0x6ab8f1 in dense_solve
	at private/star_bcyclic.f90:840
#6  0x6acb6c in __star_bcyclic_MOD_cycle_onestep._omp_fn.2
	at private/star_bcyclic.f90:346
#7  0x1555553913ed in ???
#8  0x155553c081c9 in ???
#9  0x1555538398d2 in ???
#10  0xffffffffffffffff in ???
make: *** [/mnt/home/pmocz/ceph/mesa-git-tests/tmp.XRuRWdYM61/star/work/Makefile:16: run] Floating point exception (core dumped)