Segmentation Fault when using pull-group1-pbcatom = -1 option
When using grompp on a system with pull-group1-pbcatom option set to -1 in the mdp file a segmentation fault is encountered. Values of pull-group1-pbcatom = 0 work. The option pull-group1-pbcatom = -1 works in gromacs 2018. A simple water box test case is attached.