Hi Armin, okay, something has been fixed over the past couple of days: the readline now works! :) I'll move up to that then. My benchmark, however, does not, so no cigar just yet ... Taking again the list of Anto for the jit options, this is the longest that I can run successfully: intbounds:rewrite:virtualize:string:ffi If I add "unroll" I get the NotImplementedError that Maciej already explained. If I add "heap", I get the segfault. Note that the timing of the benchmark is very good. :) I.e. heap and unroll don't actually do much for my benchmark. Of course, I can't actually run the benchmark with trunk, since I need module cppyy for that. Hence, the crash in the benchmark may be due to pbs in my own rpython (as opposed to whatever caused the issues with readline). Thanks, Wim -- WLavrijsen@lbl.gov -- +1 (510) 486 6411 -- www.lavrijsen.net