Segmentation Fault while running cmrep_vskel (TSA Advanced Tutorial) and possible solution

[SK]

I ran into the following error while running cmrep_vskel step from TSA Advanced tutorial:

TSAtry]$ ~/library/cmrep-master/build/cmrep_vskel -Q ~/library/qhull-2015.2/Build/qvoronoi tract_boundary.vtk tract_skel.vtk

Bounding Box : 54.949402 97.423203 39.863701 120.560997 103.738998 0.000000

Segmentation fault (core dumped)

I am on a 64-bit CentOS 7 machine.

Digging into VoronoiSkeletonTool.cxx code (that produces cmrep_vskel binary), I located the error to the following code snippet:

#ifndef WIN32

char fnTemplate[] = "/tmp/voronoi_pts.XXXXXX";

char *fnPoints = mktemp(fnPoints);

#else

char *fnPoints = tmpnam(NULL);

#endif

For some reason, this snippet was producing an empty fnPoints (temporary file name) which was causing an improper fopen operation resulting in segmentation fault. I got cmrel_vskel to not result in segmentation fault by replacing the above snippet with the following:

// #ifndef WIN32

// char fnTemplate[] = "/tmp/voronoi_pts.XXXXXX";

// char *fnPoints = mktemp(fnPoints);

// #else

// char *fnPoints = tmpnam(NULL);

// #endif

char *fnPoints = tmpnam(NULL);

Just wanted to post this here in case anyone else runs into this error.