[Debian-science-sagemath] Buster todo list

[Ximin Luo]

> 
> https://wiki.debian.org/DebianScience/Sage#Buster_roadmap
> 

> Fix sage/matrix/matrix_double_dense.pyx  # Testing error: no result when testing in parallel. (This causes tests to be rerun.) 

The situation is actually worse than this. If you look through the test logs, you can see that we are "Only doctesting files that failed last test", however if you grep for "matrix_double_dense" after this line you'll see that it doesn't appear and is ignored totally, and does not actually succeed.

Locally, I cannot reproduce either a success *or* having the doctesting framework ignore the matrix_double_dense when I give -f, all combinations of:

$ ./sage -t --long src/sage/matrix/matrix_double_dense.pyx
$ ./sage -t -p --long src/sage/matrix/matrix_double_dense.pyx
$ ./sage -t -p 1 --long src/sage/matrix/matrix_double_dense.pyx
$ ./sage -t -f --long src/sage/matrix/matrix_double_dense.pyx
$ ./sage -t -f -p --long src/sage/matrix/matrix_double_dense.pyx
$ ./sage -t -f -p 1 --long src/sage/matrix/matrix_double_dense.pyx

all result in:

[..]
Doctesting 1 file.
sage -t --long src/sage/matrix/matrix_double_dense.pyx
    Error in doctesting framework (no result returned)
[..]
sage: P.is_unitary(algorithm='orthonormal') ## line 2520 ##
 ** On entry to ZGEES  parameter number  6 had an illegal value

**********************************************************************
----------------------------------------------------------------------
sage -t --long src/sage/matrix/matrix_double_dense.pyx  # Testing error: no result
----------------------------------------------------------------------

X

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