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

Backtrace for this error:
#0  0x7ffff694e7a2 in ???
#1  0x7ffff694d935 in ???
#2  0x7ffff584e5af in ???
#3  0x62fc11 in __rotation_mix_info_MOD_set_rotation_mixing_info._omp_fn.0
	at ../private/rotation_mix_info.f90:209
#4  0x7ffff7d487a1 in ???
#5  0x631007 in __rotation_mix_info_MOD_set_rotation_mixing_info
	at ../private/rotation_mix_info.f90:112
#6  0x4d4c7b in __mix_info_MOD_update_rotation_mixing_info
	at ../private/mix_info.f90:1581
#7  0x4dc223 in __mix_info_MOD_set_mixing_info
	at ../private/mix_info.f90:285
#8  0x4fd80f in __hydro_vars_MOD_set_hydro_vars
	at ../private/hydro_vars.f90:615
#9  0x4ff732 in __hydro_vars_MOD_update_vars
	at ../private/hydro_vars.f90:241
#10  0x4ffabe in set_some_vars
	at ../private/hydro_vars.f90:194
#11  0x4ffe28 in __hydro_vars_MOD_set_vars
	at ../private/hydro_vars.f90:86
#12  0x5bc754 in set_start_of_step_info
	at ../private/evolve.f90:1773
#13  0x5c36d1 in prepare_for_new_step
	at ../private/evolve.f90:1888
#14  0x5c36d1 in do_step_part1
	at ../private/evolve.f90:380
#15  0x5c36d1 in __evolve_MOD_do_evolve_step_part1
	at ../private/evolve.f90:73
#16  0x40f9bf in __star_lib_MOD_star_evolve_step_part1
	at ../public/star_lib.f90:585
#17  0x40f9bf in __star_lib_MOD_star_evolve_step
	at ../public/star_lib.f90:567
#18  0x427681 in __run_star_support_MOD_do_evolve_one_step
	at ../job/run_star_support.f90:216
#19  0x427f75 in __run_star_support_MOD_run1_star
	at ../job/run_star_support.f90:119
#20  0x408dc6 in __run_star_MOD_do_run_star
	at /mnt/home/pmocz/ceph/mesa-git-tests/tmp.FUNUXBJEGp/star/job/run_star.f90:26
#21  0x408e56 in run
	at ../src/run.f90:13
#22  0x408ec5 in main
	at ../src/run.f90:2
./rn1: line 6: 76725 Floating point exception(core dumped) ./star