sage: def foo(f):
for i in range(6000):
a = sage.calculus.calculus.symbolic_expression_from_string(f)
a=a.full_simplify()
return true
....:
sage: foo("x*2+y^3+4")
------------------------------------------------------------------/
begin error-----------------------------------------------
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (1340, 0))
---------------------------------------------------------------------------
AssertionError Traceback (most recent call
last)
/home/sage/public_html/cgi-bin/<ipython console> in <module>()
/home/sage/public_html/cgi-bin/<ipython console> in foo(f)
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/symbolic/
expression.s
o in sage.symbolic.expression.Expression.simplify_full
(sage/symbolic/expression.cpp:24479)()
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/symbolic/
expression.s
o in sage.symbolic.expression.Expression.simplify_trig
(sage/symbolic/expression.cpp:24677)()
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/structure/
parent.so
in sage.structure.parent.Parent.__call__ (sage/structure/parent.c:6820)
()
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/structure/
coerce_maps
.so in sage.structure.coerce_maps.NamedConvertMap._call_
(sage/structure/coerce_maps.c:4221)()
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/interfaces/
maxima.pyc
in _symbolic_(self, R)
1841 sqrt(2)
1842 """
-> 1843 return R(self._sage_())
1844
1845 def __complex__(self):
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/interfaces/
maxima.pyc
in _sage_(self)
1822 import sage.calculus.calculus as calculus
1823 return
calculus.symbolic_expression_from_maxima_string(self.name(),
-> 1824 maxima=self.parent())
1825
1826 def _symbolic_(self, R):
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/calculus/
calculus.pyc
in symbolic_expression_from_maxima_string(x, equals_sub, maxima)
1580 if len(x) == 0:
1581 raise RuntimeError, "invalid symbolic expression --
''"
-> 1582 maxima.set('_tmp_',x)
1583
1584 # This is inefficient since it so rarely is needed:
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/interfaces/
maxima.pyc
in set(self, var, value)
1198 self._batch(cmd, batchload=True)
1199 else:
-> 1200 self._eval_line(cmd)
1201 #self._sendline(cmd)
1202 #self._expect_expr()
/home/sage/sage-4.7/local/lib/python2.6/site-packages/sage/interfaces/
maxima.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt, reformat,
error_check)
757 if not wait_for_prompt:
758 return
--> 759 assert line_echo.strip() == line.strip()
760
761 # This broke in maxima-5.22.1 as discussed in
http://trac.sagemath.org/sage_trac/ticket/10187
AssertionError:
-------------------------------------------------------------------/
end error------------------------------------------------
It does this error without the 'changing string to sage expression'
line and just inputting a sage expression as well. I have sage running
on a linux server and ran it in the terminal. I found this testing the
runtime of full_simplify() and to do that I made a simple loop doing
repeated operations of full_simplify() on the same function 5000 or
6000 times (see above). This happens in terminal and in the notebook.
Any ideas for this bug or why it occurs? I have received errors, when
being called repeatedly 5000-6000 times, in simplify_log,
simplify_trig, and simplify_factorial. I plan on testing it more and i
expect to get it from all of the simplify_x functions. The errors seem
to come from maxima as far as I can tell.
This is another one when I tested a similar loop of full_simplify() in
sage running on VMWare on a windows XP machine:
-------------------------------------------------------/begin
error--------------------------------------------------
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_13.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding:
utf-8 -*-\\n"
+
_support_.preparse_worksheet_cell(base64.b64decode("Zm9vKDIqeCt5XjMrNCk="),globa
ls())+"\\n"); execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpW90MG4/___code___.py", line 3, in <module>
exec compile(u'foo(_sage_const_2 *x+y**_sage_const_3
+_sage_const_4 )
File "", line 1, in <module>
File "/tmp/tmp8maI1s/___code___.py", line 5, in foo
q = f.simplify_full()
File "expression.pyx", line 6386, in
sage.symbolic.expression.Expression.simplify_full
(sage/symbolic/expression.cpp:23587)
File "expression.pyx", line 6637, in
sage.symbolic.expression.Expression.simplify_radical
(sage/symbolic/expression.cpp:24358)
File
"/home/sage/sage/local/lib/python2.6/site-packages/sage/interfaces/
expect.py",
line 1048, in eval
raise TypeError, 'error evaluating "%s":\n%s'%(code,s)
TypeError: error evaluating "domain: complex$":
Error executing code in Maxima
CODE:
domain: complex$
Maxima ERROR:
quit;
^Cdomain: complex$
Maxima encountered a Lisp error:
Console interrupt
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
(%i191754)
-----------------------------------------------------------------------------------------------------/
end error------------------
When i received this error the loop was:
def foo(f):
for i in range(5000):
q = f.simplify_full()
return true
And I called it with:
foo(2*x+y^3+4)
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