[Errno 86] Bad CPU type in executable: 'convert'

[seblabbe]

On !MacOS 10.15.7, 8-core Core i9 2019 MacBook Pro, Justin reported the following failure https://groups.google.com/g/sage-release/c/aOpjpfOXgro/m/pxW2mRdQAwAJ :

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File "src/sage/misc/latex.py", line 164, in sage.misc.latex.bool
Failed example:
    have_convert() # random
Exception raised:
    Traceback (most recent call last):
      File "sage/misc/cachefunc.pyx", line 996, in sage.misc.cachefunc.CachedFunction.__call__ (build/cythonized/sage/misc/cachefunc.c:5998)
        return self.cache[k]
    KeyError: ((), ())

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/doctest/forker.py", line 694, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/doctest/forker.py", line 1088, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.misc.latex.bool[1]>", line 1, in <module>
        have_convert() # random
      File "sage/misc/cachefunc.pyx", line 1001, in sage.misc.cachefunc.CachedFunction.__call__ (build/cythonized/sage/misc/cachefunc.c:6126)
        w = self.f(*args, **kwds)
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/misc/latex.py", line 171, in have_convert
        return ImageMagick().is_present()
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/features/__init__.py", line 176, in is_present
        res = self._is_present()
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/features/join_feature.py", line 63, in _is_present
        test = f._is_present()
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/features/__init__.py", line 466, in _is_present
        return self.is_functional()
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/features/imagemagick.py", line 84, in is_functional
        result = run(cmd, cwd=base, capture_output=True, text=True)
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/subprocess.py", line 505, in run
        with Popen(*popenargs, **kwargs) as process:
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/subprocess.py", line 951, in __init__
        self._execute_child(args, executable, preexec_fn, close_fds,
      File "/Users/Sage/sage-9.5.rc4/local/var/lib/sage/venv-python3.9.9/lib/python3.9/subprocess.py", line 1821, in _execute_child
        raise child_exception_type(errno_num, err_msg, err_filename)
    OSError: [Errno 86] Bad CPU type in executable: 'convert'
**********************************************************************
1 item had failures:
   1 of  23 in sage.misc.latex.bool

The is_functional method in features/imagemagick.py was added #33092.

Component: packages: optional

Author: Sébastien Labbé

Branch/Commit: 767fb8e

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/33231

[seblabbe]

comment:1

One possible solution is to put the line

result = subprocess.run(command, capture_output=True, text=True)

inside of a try to catch OSError type of failures and return False for feature not present.

[seblabbe]

Branch: u/slabbe/33231

[seblabbe]

New commits:

767fb8e

33231: running the cmd inside of a try except clause

[seblabbe]

Commit: 767fb8e

[seblabbe]

Author: Sébastien Labbé

[seblabbe]

comment:3

On my side, I tested the change by replacing convert by convvert in the cmd which generates such an OSError and I obtain:

sage: from sage.features.imagemagick import Convert
sage: a = Convert().is_functional()
sage: a
FeatureTestResult('convert', False)
sage: print(a.reason)
Running command "convvert -dispose Background -delay 20 -loop 0 
tmp_6spbh_52.png tmp_6spbh_52.gif" raised an OSError "[Errno 2]
No such file or directory: 'convvert'"

[mkoeppe]

Reviewer: Matthias Koeppe

[vbraun]

Changed branch from u/slabbe/33231 to 767fb8e