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Sage 5.0 plot issue

asked 2012-05-17 07:56:50 -0600

calc314 gravatar image

updated 2015-01-13 13:46:10 -0600

FrédéricC gravatar image

Okay, so I've rebooted my Mac in 64 bit mode and am running Sage 5.0. When I do a plot3d and specify an opacity, I get the following error:

------------------------------------------------------------------------
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.
------------------------------------------------------------------------

I also get this on one simple interact that runs in the single cell server at sagemath.org/eval.html, which I assume is running Sage 5.0. Other interacts seem to run okay for me. The interact is:

var('x')
@interact
def test(a=slider(0,10,0.1,2),b=slider(-6,6,.1,0),c=slider(-3,3,1,1),d=slider(-4,4,1,0)):
   print 'Plot y = '+str(c)+'sin('+str(a)+'x + '+str(b)+') + '+str(d)
   p1=plot(c*sin(a*x+b)+d,(x,-6,6))
   show(p1)

I'm guessing that I don't have something set up right for Sage 5.0 to run correctly. Any ideas?

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answered 2012-05-17 08:20:15 -0600

kcrisman gravatar image

Do you have a middle-aged Mac? (Say, a Core Duo?)

Try

sage: int(2.4)

and if it crashes, you have the problem described at Trac 12954.

Building from scratch will make things fine, otherwise you may want to revert to 4.8 for now. Sadly.

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That was it. Too bad. Thanks!

calc314 gravatar imagecalc314 ( 2012-05-17 08:34:39 -0600 )edit
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answered 2012-12-06 03:57:23 -0600

stecher gravatar image

I'm having the exact same problem with Sage 5.4.1 on a Core 2 Duo Mac running OSX 10.7.5. Trac 12954 suggests the problem is fixed. Is this a new problem then? (The error output is the same as given above...)

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It sounds like it might be a new problem. Did you build Sage from source, or did you download the binary?

Jason Grout gravatar imageJason Grout ( 2012-12-06 04:49:08 -0600 )edit

I downloaded the binary (Sage-5.4.1-OSX-64bit-10.7.app). Would it help if I tried to build it? Would I need anything other than Xcode for that?

stecher gravatar imagestecher ( 2012-12-06 05:24:39 -0600 )edit

Probably the problem is that you have a Core 2 Duo that is not 100% 64-bit; this has been a common issue lately with binaries. Xcode should be enough, or you might do well with a 10.6 binary. We're working on fixing this problem.

kcrisman gravatar imagekcrisman ( 2012-12-06 14:23:34 -0600 )edit
1

Thanks for that. The 64-bit 10.6 binary seems to work.

stecher gravatar imagestecher ( 2012-12-06 23:14:31 -0600 )edit

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Asked: 2012-05-17 07:56:50 -0600

Seen: 395 times

Last updated: Dec 06 '12