When individually doctesting tableau.py with vanilla 8.7.beta3 I see:
sage -t --long src/sage/combinat/tableau.py # Bad exit: 1
The source is
Trying (line 7735): StandardTableaux(50).cardinality() # long time
Expecting:
27886995605342342839104615869259776
**********************************************************************
File "src/sage/combinat/tableau.py", line 7735, in
sage.combinat.tableau.StandardTableaux_size.cardinality
Failed example:
StandardTableaux(50).cardinality() # long time
Exception raised:
Traceback (most recent call last):
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 671, in _run
self.compile_and_execute(example, compiler, test.globs)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 1095, in compile_and_execute
exec(compiled, globs)
File "<doctest
sage.combinat.tableau.StandardTableaux_size.cardinality[4]>", line 1, in
<module>
StandardTableaux(Integer(50)).cardinality() # long time
File "sage/misc/lazy_import.pyx", line 354, in
sage.misc.lazy_import.LazyImport.__call__
(build/cythonized/sage/misc/lazy_import.c:3683)
return self.get_object()(*args, **kwds)
File "sage/misc/classcall_metaclass.pyx", line 330, in
sage.misc.classcall_metaclass.ClasscallMetaclass.__call__
(build/cythonized/sage/misc/classcall_metaclass.c:1700)
return cls.classcall(cls, *args, **kwds)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/combinat/tableau.py",
line 7568, in __classcall_private__
return StandardTableaux_size(n)
File "sage/misc/classcall_metaclass.pyx", line 330, in
sage.misc.classcall_metaclass.ClasscallMetaclass.__call__
(build/cythonized/sage/misc/classcall_metaclass.c:1700)
return cls.classcall(cls, *args, **kwds)
File "sage/misc/cachefunc.pyx", line 1005, in
sage.misc.cachefunc.CachedFunction.__call__
(build/cythonized/sage/misc/cachefunc.c:6067)
w = self.f(*args, **kwds)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/structure/unique_representation.py",
line 1027, in __classcall__
instance = typecall(cls, *args, **options)
File "sage/misc/classcall_metaclass.pyx", line 497, in
sage.misc.classcall_metaclass.typecall
(build/cythonized/sage/misc/classcall_metaclass.c:2150)
return (<PyTypeObject*>type).tp_call(cls, args, kwds)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/combinat/tableau.py",
line 7677, in __init__
facade=True, keepkey=False)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/sets/disjoint_union_enumerated_sets.py",
line 288, in __init__
self._facade_for = tuple(family)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/sets/family.py",
line 1061, in __iter__
for i in self.set:
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/combinat/partition.py",
line 6698, in __iter__
yield self.element_class(self, p)
File "sage/misc/classcall_metaclass.pyx", line 333, in
sage.misc.classcall_metaclass.ClasscallMetaclass.__call__
(build/cythonized/sage/misc/classcall_metaclass.c:1725)
return (<PyTypeObject*>type).tp_call(cls, args, kwds)
MemoryError
Trying (line 7740): def cardinality_using_hook_formula(n):
c = 0
for p in Partitions(n):
c += StandardTableaux(p).cardinality()
return c
Expecting nothing
ok [0.00 s]
Trying (line 7745): all(cardinality_using_hook_formula(i) ==
StandardTableaux(i).cardinality() for i in range(10))
Expecting:
True
Process DocTestWorker-1:
Traceback (most recent call last):
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/multiprocessing/process.py",
line 267, in _bootstrap
self.run()
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 2139, in run
task(self.options, self.outtmpfile, msgpipe, self.result_queue)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 2498, in __call__
result_queue.put(result, False)
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/multiprocessing/queues.py",
line 107, in put
self._start_thread()
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/multiprocessing/queues.py",
line 195, in _start_thread
self._thread.start()
File
"/64bitdev/storage/sage-git_develop/sage/local/lib/python2.7/threading.py",
line 736, in start
_start_new_thread(self.__bootstrap, ())
error: can't start new thread
Bad exit: 1
**********************************************************************
Usually there is no failure if the doctest is run again. I've been able to
replicate this by rebuilding sagelib and re-running the individual doctest.
I first noticed this on a Sage-on-Gentoo install in Prefix where the host
is Debian (see
https://github.com/cschwan/sage-on-gentoo/commit/f62108870dbc9c69adbb5e1dcb772c405519f569#commitcomment-32252815).
In the Prefix the tableau.py doctest always fails with a MemoryError. In
the Prefix there are 3 MemoryError failures, all associated with '--long'
doctests. Perhaps others have seen this failure.
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