OK, weird. Is this a particularly big abstract? I don’t see how it would use too much memory otherwise…
Anyway, now that you have an error try googling for it
latex "fatal: memory exhausted" would be my suggestion to put in Google. FWIW, I never encountered that error myself (and I don’t remember anyone in the team ever having such a problem either) so I’d have to start googling for it as well.
If you do not find a solution, zipping the contents of the
indico-texgen-gfg8eX folder and uploading it here (assuming it contains no sensitive information) could be helpful as it’d allow others to see if they have the same problem.