#12149: float('nan')>1 crashes Sage.
--------------------------------+-------------------------------------------
   Reporter:  was               |          Owner:  AlexGhitza   
       Type:  defect            |         Status:  needs_review 
   Priority:  critical          |      Milestone:  sage-4.8     
  Component:  basic arithmetic  |       Keywords:               
Work_issues:                    |       Upstream:  N/A          
   Reviewer:                    |         Author:  William Stein
     Merged:                    |   Dependencies:               
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Comment(by SimonKing):

 Replying to [comment:18 jdemeyer]:
 > By the way: it's almost impossible that simply adding
 `sig_on()`/`sig_off()` would make the execution time jump from 281ns to
 3.92µs, so probably you did something wrong there.

 Don't forget the time for catching the error. My code looks like
 {{{
                try:
                    sig_on()
                    c = mpz_cmp_d((<Integer>left).value,
 PyFloat_AsDouble(right))
                    sig_off()
                except RuntimeError:
                    return False
 }}}
 I doubt that this is obviously wrong, provided that we want to return
 "False" instead of letting the runtime error be raised.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12149#comment:19>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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