Should evaluating 1.0e-15 produce an Unhandled SIGILL

asked 2012-06-09 12:40:06 +0200

martinB
13 ●1 ●2 ●6

updated 2012-06-09 13:22:50 +0200

Since downloading Sage 5.0 evaluating 1.0e-15 produces an Unhandled SIGILL in the notebook on Mac OSX. Has the input format changed from what it was in 4.7?

Now it seems I have to type 1.0*10.0^-15 (a lot more characters!)

...or is this a bug?

sage: 10.0^-1
0.100000000000000
sage: 1.0e-1
------------------------------------------------------------------------
Unhandled SIGILL: An illegal instruction occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and 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.
------------------------------------------------------------------------

answered 2012-06-09 15:24:35 +0200

calc314
4191 ●22 ●48 ●113

updated 2012-06-09 15:26:32 +0200

If you have a duo core slightly older Mac, then I think this is the same issue that I was having at: Sage 5.0 plot issue.

You might want to read @kcrisman's answer there. He suggested trying the following command to see if it would crash:

sage: int(2.4)

There is also a ticket on this at: Trac 12954

Apparently, building Sage from scratch on the system will resolve this issue, but I have not tried that yet.

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oh well... I guess I better figure out how to build this thing then.

martinB ( 2012-06-09 15:42:01 +0200 )edit

Not at all! Look in http://sage.math.washington.edu/home/buildbot/binaries/sage/5.0.1.rc1/ and see if your architecture lives there. I have a feeling that this will be VERY similar to the released 5.0.1, which largely exists to have a release fixing this bug.

kcrisman ( 2012-06-09 22:05:40 +0200 )edit

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