I uploaded a file to support.slickedit.com called osn_ii.cc.
After I open this file in SE editor window, after about 10 seconds SE crashes with a segmentation fault.
Unfortunately, I can't find a core dump in the directory where SE was launched from, and I did use ulimit -c unlimited, so I don't know why I don't have a core dump.
But maybe you can reproduce it on your end?
Note that I have .cc extension configured as C++ files for SE, so you may need to change default configuration for that.
As a workaround, if I remove the .cc extension, call the file just "osn_ii", then there is no crash.
This file is from the output of a preprocessor.