I have a random doctest failure on several machines running debian. It does
not happen always, never if I doctest the file directly, only with make
ptestlong. It is more likely to happen in a virtual machine so I think it
is a type of race condition or memory management issue.
Any idea how to debug this?
File
"src/sage/tests/books/computational-mathematics-with-sagemath/graphique_docc
test.py", line 112, in
sage.tests.books.computational-mathematics-with-sagemath..
graphique_doctest
Failed example:
for i in srange(-2, 2, 0.2): # long time
g += line(desolve_rk4(DE, y(x), ics=[1, i],\
step=0.05, end_points=[0,2]))
g += line(desolve_rk4(DE, y(x), ics=[-1, i],\
step=0.05, end_points=[-2,0]))
Exception raised:
Traceback (most recent call last):
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/doctest/forkee
r.py", line 681, in _run
self.compile_and_execute(example, compiler, test.globs)
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/doctest/forkee
r.py", line 1105, in compile_and_execute
exec(compiled, globs)
File "<doctest
sage.tests.books.computational-mathematics-with-sagemath.grr
aphique_doctest[50]>", line 3, in <module>
step=RealNumber('0.05'), end_points=[Integer(0),Integer(2)]))
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/calculus/desoo
lvers.py", line 1378, in desolve_rk4
sol_2=maxima(cmd).sage()
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/interfaces/inn
terface.py", line 1081, in sage
return self._sage_(*args, **kwds)
return self._sage_(*args, **kwds)
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/interfaces/maa
xima_abstract.py", line 1238, in _sage_
maxima=self.parent())
File
"/home/sage/sage/local/lib/python2.7/site-packages/sage/calculus/calcc
ulus.py", line 2210, in symbolic_expression_from_maxima_string
raise TypeError("unable to make sense of Maxima expression '%s' in
Sage""
%s)
TypeError: unable to make sense of Maxima expression
'(kill(sage4)$o44)[[1.00
,-2.0],[1.05,-2.149874965475482],[1.1,-2.298999939830521],[1.15,-2.44662492148799
98],[1.2,-2.591999909207452],[1.25,-2.7343749020044],[1.3,-2.872999899091065],[11
.35,-3.007124899832311],[1.4,-3.135999903712506],[1.45,-3.258874910310362],[1.5,,
-3.374999919279643],[1.55,-3.483624930334245],[1.6,-3.58399994323656],[1.65,-3.66
75374957788335],[1.7,-3.756999973823437],[1.75,-3.828124991202094],[1.8,-3.888000
0009806273],[1.85,-3.935875029535953],[1.9,-3.971000050306113],[1.95,-3.992625077
2044261],[2.0,-4.000000094688424]]' in Sage
**********************************************************************
1 item had failures:
1 of 117 in
sage.tests.books.computational-mathematics-with-sagemath.graphiquu
e_doctest
[116 tests, 1 failure, 20.81 s]
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