[cgma-dev] Seg fault when loading OCC geometry with associations

[Jed Brown]

My brick generator creates some boundary conditions using the Cubit
conventions, and creates a geometric model using CGM (built with OCC)
via iGeom_createBrick.  If I associate the boundary sets with the brick
(wrong, but bear with me) using iRel (geometry first, I get seg-faults
if I try mesh first) and save the mesh (in .h5m) and geometry (to a
.brep, with TYPE=OCC) then I can load them with another program.  When I
try to get the geometric entity related to a boundary set, I get a point
instead of the volume that I should get.

If I use iGeom_getEntAdj to get the faces of the brick and associate my
boundary sets with those faces (what I actually want to do) then I get a
seg-fault with the trace below.  Is this supposed to work?  Any ideas
for debugging it?

Why does CGM use different options delimiters (":,\n\t") than MOAB
(";")?  I have discovered "ENGINE=OCC" for iGeom_newGeom and "TYPE=OCC"
for iGeom_load by reading the source, but are there other options to be
aware of?

Perhaps these problems go away when using ACIS, but I need to use OCC
until our Cubit license comes through.

Jed


$ gdb --args ~/iMesh/rtest dblock.brep dblock.h5m 200
(gdb) r
Starting program: /home/jed/iMesh/rtest dblock.brep dblock.h5m 200
[Thread debugging using libthread_db enabled]
[New Thread 0x7f4044c47700 (LWP 22373)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f4044c47700 (LWP 22373)]
0x00007f40431c8f1c in CubitStringRep::increment (this=0x800000001) at ../../util/CubitString.cpp:80
80        ++refCount;
Current language:  auto; currently c++
(gdb) bt
#0  0x00007f40431c8f1c in CubitStringRep::increment (this=0x800000001) at ../../util/CubitString.cpp:80
#1  0x00007f40431c8f80 in CubitString (this=0x277a810, s=@0x277a6f0) at ../../util/CubitString.cpp:126
#2  0x00007f40430a731d in CubitSimpleAttrib::initialize_from_lists (this=0x277a890, string_list=0x7fff4cc97150, 
    double_list=0x7fff4cc97130, int_list=0x7fff4cc97110) at ../../geom/CubitSimpleAttrib.cpp:156
#3  0x00007f40430a80f7 in CubitSimpleAttrib (this=0x277a890, string_list=0x7fff4cc97150, double_list=0x7fff4cc97130, 
    int_list=0x7fff4cc97110) at ../../geom/CubitSimpleAttrib.cpp:90
#4  0x00007f4042e1a396 in OCCShapeAttributeSet::ReadAttribute (this=0x7fff4cc97590, S=@0x7fff4cc972d0, IS=@0x7fff4cc97380, 
    l_attr=@0x7fff4cc97360) at ../../../geom/OCC/OCCShapeAttributeSet.cpp:473
#5  0x00007f4042e1a97f in OCCShapeAttributeSet::Read (this=0x7fff4cc97590, IS=@0x7fff4cc97380, l_attr=@0x7fff4cc97360, 
    print_results=true) at ../../../geom/OCC/OCCShapeAttributeSet.cpp:758
#6  0x00007f4042e71632 in OCCQueryEngine::Read (this=0x276ebd0, Sh=@0x20007958, File=0x2774fe0 "dblock.brep", label=
      {myLabelNode = 0x276ef30}, print_results=true) at ../../../geom/OCC/OCCQueryEngine.cpp:1146
#7  0x00007f4042e7183e in OCCQueryEngine::import_solid_model (this=0x276ebd0, file_name=0x2774fe0 "dblock.brep", 
    file_type=0x7f4044661f06 "OCC", imported_entities=@0x7fff4cc97900, print_results=true, logfile_name=0x0, heal_step=true, 
    import_bodies=true, import_surfaces=true, import_curves=true, import_vertices=true, free_surfaces=true)
    at ../../../geom/OCC/OCCQueryEngine.cpp:1192
#8  0x00007f40430f1b05 in GeometryQueryTool::import_solid_model (this=0x276c310, file_name=0x2774fe0 "dblock.brep", 
    file_type=0x7f4044661f06 "OCC", logfile_name=0x0, heal_step=true, import_bodies=true, import_surfaces=true, import_curves=true, 
    import_vertices=true, free_surfaces=true, imported_entities=0x0) at ../../geom/GeometryQueryTool.cpp:624
#9  0x00007f40430f2fbc in GeometryQueryTool::read_geometry_file (this=0x276c310, fileName=0x2774ce8 "dblock.brep", includePath=0x0, 
    type=0x7f4044661f06 "OCC") at ../../geom/GeometryQueryTool.cpp:213
#10 0x00007f404465afa6 in igeom_load_ (instance=0x7f404486dac0, name=0x2774ce8 "dblock.brep", options=0x7fff4cc97bf0 "TYPE=OCC:", 
    err=0x7fff4cc97bec, name_len=11, options_size=10) at ../../itaps/iGeom_CGMA.cc:363
#11 0x0000000000403c4f in main (argc=4, argv=0x7fff4cc97d08) at rtest.c:260
(gdb) quit
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