I use Open Babel 2.3.2 from the ubuntu package manager. I get a lot of segmentation faults if I want to convert an InChi to a MDL or sdf file.
Example:
example.inchi
InChI=1S/C5H9NO4/c6-3(5(9)10)1-2-4(7)8/h3H,1-2,6H2,(H,7,8)(H,9,10)/t3-/m0/s1
I execute
obabel -iinchi inchi/mpos19.inchi -osdf
and get a Segmentation fault
Same happens if I provide --gen2d. If I provide --gen3D I get a lot of warnings but a reasonable output without segfaults.
This appears to be working now with the current development code (I confirm that it was a problem with the latest release).