Test failure of sage/homology/delta_complex.py

[drkirkby]

I'm getting lots of failures on a patched version of 4.3.4.alpha0 for many files related to homology:

        sage -t  -long "devel/sage/sage/homology/delta_complex.py"
        sage -t  -long "devel/sage/sage/homology/cubical_complex.py"
        sage -t  -long "devel/sage/sage/homology/examples.py"
        sage -t  -long "devel/sage/sage/homology/cell_complex.py"
        sage -t  -long "devel/sage/sage/homology/chain_complex.py"
        sage -t  -long "devel/sage/sage/homology/simplicial_complex.py"

The ones involving simplicial_complex.py all report

OSError: [Errno 2] No such file or directory

See below for me detailed information. I think John deals with this sort of thing, but I don't even know what to classify it as, so I've stuck it on doctest.

sage -t  -long "devel/sage/sage/homology/delta_complex.py"
**********************************************************************
File "/export/home/drkirkby/32/sage-4.3.4.alpha0/devel/sage/sage/homology/delta_complex.py", line 114:
    sage: S5.homology()
Exception raised:
    Traceback (most recent call last):
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_1[5]>", line 1, in <module>
        S5.homology()###line 114:
    sage: S5.homology()
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/homology/cell_complex.py", line 555, in homology
        answer = C.homology(**kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/homology/chain_complex.py", line 721, in homology
        H = homchain(self, **kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/interfaces/chomp.py", line 584, in homchain
        return CHomP()('homchain', complex, **kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/interfaces/chomp.py", line 250, in __call__
        output = Popen(cmd, stdout=PIPE).communicate()[0]
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python2.6/subprocess.py", line 621, in __init__
        errread, errwrite)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python2.6/subprocess.py", line 1126, in _execute_child
        raise child_exception
    OSError: [Errno 2] No such file or directory
**********************************************************************
File "/export/home/drkirkby/32/sage-4.3.4.alpha0/devel/sage/sage/homology/delta_complex.py", line 186:
    sage: P.homology(1)
Exception raised:
    Traceback (most recent call last):
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_1[12]>", line 1, in <module>
        P.homology(Integer(1))###line 186:
    sage: P.homology(1)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/homology/cell_complex.py", line 555, in homology
        answer = C.homology(**kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/homology/chain_complex.py", line 721, in homology
        H = homchain(self, **kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/interfaces/chomp.py", line 584, in homchain
        return CHomP()('homchain', complex, **kwds)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python/site-packages/sage/interfaces/chomp.py", line 250, in __call__
        output = Popen(cmd, stdout=PIPE).communicate()[0]
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python2.6/subprocess.py", line 621, in __init__
        errread, errwrite)
      File "/export/home/drkirkby/32/sage-4.3.4.alpha0/local/lib/python2.6/subprocess.py", line 1126, in _execute_child
        raise child_exception
    OSError: [Errno 2] No such file or directory

[jhpalmieri]

I believe this should be fixed by the patch at #8474, which gets to the heart of the matter.

[drkirkby]

As I commented on #8474, I not so convinced this is true at least now.

[drkirkby]

This can now be closed, as #8474, does solve this.

[mvngu]

Close as fixed by #8474.