segfault when using LATTICE option in scuff-neq

[rbsecor]

ddd output:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff711bc5d in scuff::StampInNeighborBlock (B=0x4cda60, GradB=0x0, NR=NR@entry=3176, NC=NC@entry=3176, M=M@entry=0x4cd940, GradM=GradM@entry=0x0, RowOffset=0, ColOffset=0, L=0x7fffffffc500, kBloch=0x0, UseSymmetry=true) at AssembleBEMMatrix.cc:82
Missing separate debuginfos, use: dnf debuginfo-install blas-3.8.0-12.fc30.x86_64 hdf5-1.8.20-6.fc30.x86_64 lapack-3.8.0-12.fc30.x86_64 libaec-1.0.4-1.fc30.x86_64 libgcc-9.2.1-1.fc30.x86_64 libgfortran-9.2.1-1.fc30.x86_64 libgomp-9.2.1-1.fc30.x86_64 libquadmath-9.2.1-1.fc30.x86_64 libstdc++-9.2.1-1.fc30.x86_64 zlib-1.2.11-19.fc30.x86_64
(gdb) where
#0 0x00007ffff711bc5d in scuff::StampInNeighborBlock (B=0x4cda60, GradB=0x0, NR=NR@entry=3176, NC=NC@entry=3176, M=M@entry=0x4cd940, GradM=GradM@entry=0x0, RowOffset=0, ColOffset=0, L=0x7fffffffc500, kBloch=0x0, UseSymmetry=true) at AssembleBEMMatrix.cc:82
#1 0x00007ffff711cf76 in scuff::RWGGeometry::AssembleBEMMatrixBlock (this=this@entry=0x41fc30, nsa=nsa@entry=0, nsb=nsb@entry=0, Omega=..., kBloch=kBloch@entry=0x0, M=0x4cd940, GradM=GradM@entry=0x0, RowOffset=0, ColOffset=0, Accelerator=0x0, TransposeAccelerator=false, NumTorqueAxes=0, dMdT=0x0, GammaMatrix=0x0) at AssembleBEMMatrix.cc:505
#2 0x0000000000404952 in WriteFlux (SNEQD=SNEQD@entry=0x41fab0, Omega=..., kBloch=kBloch@entry=0x0) at WriteFlux.cc:244
#3 0x0000000000402fef in main (argc=, argv=) at scuff-neq.cc:279