On 25 Mai, 11:30, Kwankyu Lee <ekwan...@gmail.com> wrote:
> Hi,
>
> I am debugging a patch of my own. Perhaps due to the patch, I get the
> following strange doctest failure.
>
> sage -t  "4.4.2/devel/sage-main/sage/modules/free_module.py"
> **********************************************************************
> File "/Users/Kwankyu/Sage/sage-4.4.2/devel/sage-main/sage/modules/
> free_module.py", line 1125:
>     sage: V.base_extend(QQ)
> Expected:
>     Vector space of dimension 7 over Rational Field
> Got:
>     V
> **********************************************************************
> 1 items had failures:
>    1 of   4 in __main__.example_23
> ***Test Failed*** 1 failures.
> For whitespace errors, see the file /Users/Kwankyu/.sage//
> tmp/.doctest_free_module.py
>          [16.8 s]
>
> ----------------------------------------------------------------------
> The following tests failed:
>
>         sage -t  "4.4.2/devel/sage-main/sage/modules/free_module.py"
> Total time for all tests: 16.8 seconds
>
> However, if I type in the exactly same doctest found in lines
> 1124-1125 of "free_module.py", then I get the correct result instead
> of just "V", as you see below.
>
> athena:sage-main Kwankyu$ sage
> ----------------------------------------------------------------------
> | Sage Version 4.4.2, Release Date: 2010-05-19                       |
> | Type notebook() for the GUI, and license() for information.        |
> ----------------------------------------------------------------------
> sage: V = ZZ^7
> sage: V.base_extend(QQ)
> Vector space of dimension 7 over Rational Field
> sage:
>
> How possibly could this happen? Why I get a different result in
> doctesting? I seek of your expertise. Thank you in advance.

This is a known issue, and most probably ;-) not related to your
patch:

See e.g. http://groups.google.com/group/sage-release/msg/dac6cb862ecf6a8e

-Leif

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