Works for me (Fedora 18 x86_64), with or without ulimit. No crash and
finishes within 2 seconds:
[vbraun@volker-desktop t]$ cat makefile
truc:
sage crash-maxima.sage
[vbraun@volker-desktop t]$ cat crash-maxima.sage
x, y = var('x y')
desolve_rk4(x*y*(2-y), y, ics=[0,1], end_points=[0, 1], step=0.5)
[vbraun@volker-desktop t]$ ulimit -v
unlimited
[vbraun@volker-desktop t]$ make
sage crash-maxima.sage
[vbraun@volker-desktop t]$ ulimit -v 2500000
[vbraun@volker-desktop t]$ make
sage crash-maxima.sage
[vbraun@volker-desktop t]$ time make
sage crash-maxima.sage
real 0m1.662s
user 0m1.125s
sys 0m0.243s
[vbraun@volker-desktop t]$
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