When create layer description file, ctb-tile core dump

[tingzhenli]

In my centos7(memory:32G):

1. docker run -it --name ctb -v "/data/maping/to3dtile/dsm":"/data" tumgis/ctb-quantized-mesh
2. ctb-tile -f Mesh -C -N -o out dsm.tif note: the dsm.tif is 82MBytes from opendronemap
3. It uses 2minutes to finish the above process
4. ctb-tile -f Mesh -C -N -l -o out dsm.tif
5. The computer memory used by ctb-tile increase to > 90% and core dump
6. Test data

[tingzhenli]

I fix it:
4. ctb-tile -f Mesh -C -N -l -o out dsm.tif ====> ctb-tile -c 1 -f Mesh -C -N -l -o out dsm.tif
so, there must has a mulit-thread problem.

[yogi-as]

@tingzhenli thank you for the workaround, I've been struggling with this core dump issue for a while