Hi,
i just got my sage crashed with theis following command
sage: filter(lambda x: all([item.denominator()._cmp_(1) for item in
x]), [[coordinate.subs(c=0).subs(b=0) for coordinate in item] for item
in wi ])
------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component
of Sage has a bug in it (typically accessing invalid memory)
or is not properly wrapped with _sig_on, _sig_off.
You might want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate (sorry).
------------------------------------------------------------
Process SAGE exited abnormally with code 1
using Sage Version 4.5.3, Release Date: 2010-09-04
running sage -gdb leads to this:
sage: filter(lambda x: all([item.denominator()._cmp_(1) for item in
x]), [[coordinate.subs(c=0).subs(b=0) for coordinate in item] for item
in wi ])
Program received signal SIGSEGV, Segmentation fault.
GiNaC::basic::compare (this=0x8416bb0, other=...) at basic.cpp:838
838 basic.cpp: No such file or directory.
in basic.cpp
it seems to be a bug in the _cmp_ function.
greatz Johannes
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