Hi, I wrote a blog entry yesterday about using rpython for the great computer language shootout recursive program, and got a RunTime error when I input on the commandline 11 (1 to 10 goes fine). Just did an svn update of pypy to version 51115 and still get the error, here is the program: blog entry: http://amundblog.blogspot.com/2008/01/rpython-gclb-benchmark-recursive.html source file: recursive.py # The Computer Language Shootout # http://shootout.alioth.debian.org/ # based on bearophile's psyco program # slightly modified by Isaac Gouy def Ack(x, y): if x == 0: return y+1 if y == 0: return Ack(x-1, 1) return Ack(x-1, Ack(x, y-1)) def Fib(n): if n < 2: return 1 return Fib(n-2) + Fib(n-1) def FibFP(n): if n < 2.0: return 1.0 return FibFP(n-2.0) + FibFP(n-1.0) def Tak(x, y, z): if y < x: return Tak( Tak(x-1,y,z), Tak(y-1,z,x), Tak(z-1,x,y) ) return z def TakFP(x, y, z): if y < x: return TakFP( TakFP(x-1.0,y,z), TakFP(y-1.0,z,x), TakFP(z-1.0,x,y) ) return z from sys import argv, setrecursionlimit setrecursionlimit(20000) def main(argv): n = int(argv[1]) - 1 print "Ack(3,%d):" % (n+1), Ack(3, n+1) print "Fib(" + str(28.0+n) + "," + str(FibFP(28.0+n)) print "Tak(%d,%d,%d): %d" % (3*n, 2*n, n, Tak(3*n, 2*n, n)) print "Fib(3):", Fib(3) print "Tak(3.0,2.0,1.0):", TakFP(3.0, 2.0, 1.0) return 0 from pypy.translator.interactive import Translation t = Translation(main, standalone=True, gc='ref') t.source(backend='c') path = t.compile() print path Best regards, Amund