#5769: power series are accidentally *mutable* (really dangerous)
------------------------------+---------------------------------------------
Reporter: was | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: basic arithmetic | Keywords:
------------------------------+---------------------------------------------
{{{
wst...@sage:~/build/sage-3.4.1.rc2$ ./sage
----------------------------------------------------------------------
| Sage Version 3.4.1.rc2, Release Date: 2009-04-10 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
Loading Sage library. Current Mercurial branch is: ref2
sage: R.<t> = ZZ[[]]
sage: f = 1 + 17*t - 4*t^3 + O(t^5)
sage: f[1] = 10
...
IndexError: power series are immutable
}}}
Except they are mutable:
{{{
sage: f *= 2
sage: f
2 + 34*t - 8*t^3 + O(t^5)
}}}
But they shouldn't be! The _imul_ method needs to be deleted.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5769>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
