#6412: [with patch, needs review] Getting Singular's cputime does not work with
negative argument
------------------------+---------------------------------------------------
Reporter: SimonKing | Owner: SimonKing
Type: defect | Status: new
Priority: minor | Milestone: sage-4.1
Component: interfaces | Keywords: cputime Singular
Reviewer: | Author: SimonKing
Merged: |
------------------------+---------------------------------------------------
In some application, I accidentally had a negative argument {{{t}}} to
{{{singular.cputime(t)}}}. Actually I don't know how this came, but
anyway: This lead to a Traceback, since {{{t}}} is inserted into a string:
'timer-%d'%t
Of coure, if t has a minus sign, Singular complains.
Easy solution: Put brackets aroung %d.
Without the patch:
{{{
sage: singular.cputime(-7)
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/home/SimonKing/.sage/temp/sage.math.washington.edu/18981/_home_SimonKing__sage_init_sage_0.py
in <module>()
/usr/local/sage/local/lib/python2.5/site-
packages/sage/interfaces/singular.pyc in cputime(self, t)
677 """
678 if t:
--> 679 return
float(self.eval('timer-%d'%(int(1000*t))))/1000.0
680 else:
681 return float(self.eval('timer'))/1000.0
/usr/local/sage/local/lib/python2.5/site-
packages/sage/interfaces/singular.pyc in eval(self, x, allow_semicolon,
strip, **kwds)
547
548 if s.find("error") != -1 or s.find("Segment fault") != -1:
--> 549 raise RuntimeError, 'Singular error:\n%s'%s
550
551 if get_verbose() > 0:
RuntimeError: Singular error:
? --(`int`) failed
? expected --(`identifier`)
? error occurred in STDIN line 19: `timer--7000;`
}}}
With the patch:
{{{
sage: singular.cputime(-70)
70.060000000000002
}}}
It will certainly hardly ever occur that people call the cputime with a
negative starting point, but why not fix a corner case?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6412>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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