Re: [gentoo-science] [sage-on-gentoo] gdmodule-0.56-r1

[Christopher Schwan]

Hi Steven,

thank you for reporting! I have investigated on this and filed a bug for it: 

https://bugs.gentoo.org/show_bug.cgi?id=347722

On Friday 03 December 2010 22:49:37 Steven Trogdon wrote:
> Hello,
>
> With the upgrade from gdmodule-0.56 -> gdmodule-0.56-r1 the following
> sage test now fails
>
> 	sage -t  -long -force_lib "devel/sage/sage/matrix/matrix2.pyx"
>
> as
>
> **********************************************************************
> File "/usr/share/sage/devel/sage/sage/matrix/matrix2.pyx", line 5463:
>      sage: M.visualize_structure(SAGE_TMP + "matrix.png")
> Exception raised:
>      Traceback (most recent call last):
>        File "/usr/bin/ncadoctest.py", line 1231, in run_one_test
>          self.run_one_example(test, example, filename, compileflags)
>        File "/usr/bin/sagedoctest.py", line 38, in run_one_example
>          OrigDocTestRunner.run_one_example(self, test, example,
> filename, compileflags)
>        File "/usr/bin/ncadoctest.py", line 1172, in run_one_example
>          compileflags, 1) in test.globs
>        File "<doctest __main__.example_83[3]>", line 1, in <module>
>          M.visualize_structure(SAGE_TMP + "matrix.png")###line 5463:
>      sage: M.visualize_structure(SAGE_TMP + "matrix.png")
>        File "matrix2.pyx", line 5520, in
> sage.matrix.matrix2.Matrix.visualize_structure
> (sage/matrix/matrix2.c:31006)
>      NotImplementedError: PNG Support Not Available
> **********************************************************************
>
> The 0.56-libs.patch that's the reason for the upgrade (which appears to
> be the thing to do) actually prevents Sage from finding PNG support.
> The older version still works.
>
> Steve

Cheers,

Christopher