maxima interface bug caused by bad use of file when evaluating large input

[williamstein]

sage: maxima.eval('plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,-5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,-2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],[x,0,n],[plot_format,gnuplot_pipes],[y, 0, 8],[ylabel,"y"],[gnuplot_preamble, "set grid xtics ytics"],[legend,false])')
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-1-78e2a9c764b1> in <module>()
----> 1 maxima.eval('plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,-5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,-2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],[x,0,n],[plot_format,gnuplot_pipes],[y, 0, 8],[ylabel,"y"],[gnuplot_preamble, "set grid xtics ytics"],[legend,false])')

/usr/local/src/sage-git/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc in eval(self, code, strip, synchronize, locals, allow_use_file, split_lines, **kwds)
   1239                 if (split_lines == "nofile" and allow_use_file and
   1240                         self._eval_using_file_cutoff and len(code) > self._eval_using_file_cutoff):
-> 1241                     return self._eval_line_using_file(code)
   1242                 elif split_lines:
   1243                     return '\n'.join([self._eval_line(L, allow_use_file=allow_use_file, **kwds)

/usr/local/src/sage-git/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc in _eval_line_using_file(self, line, restart_if_needed)
    757                 except RuntimeError as msg:
    758                     raise RuntimeError('%s terminated unexpectedly while reading in a large line'%self)
--> 759             if "Input/output error" in msg[0]: # This occurs on non-linux machines
    760                 raise RuntimeError('%s terminated unexpectedly while reading in a large line'%self)
    761             raise RuntimeError('%s terminated unexpectedly while reading in a large line:\n%s'%(self,msg[0]))

IndexError: tuple index out of range

Likely duplicates: #17388, #12360

Component: interfaces

Issue created by migration from https://trac.sagemath.org/ticket/1660

[jdemeyer]

Description changed:

--- 
+++ 
@@ -1,43 +1,24 @@
 
 ```
-> That's weird.  Can you post the _exact_ input
-> and output from a complete session where you get
-> sage1 as the output from maxima.eval('...')?  Thanks.
->
+sage: maxima.eval('plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,-5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,-2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],[x,0,n],[plot_format,gnuplot_pipes],[y, 0, 8],[ylabel,"y"],[gnuplot_preamble, "set grid xtics ytics"],[legend,false])')
+---------------------------------------------------------------------------
+IndexError                                Traceback (most recent call last)
+<ipython-input-1-78e2a9c764b1> in <module>()
+----> 1 maxima.eval('plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,-5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,-2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],[x,0,n],[plot_format,gnuplot_pipes],[y, 0, 8],[ylabel,"y"],[gnuplot_preamble, "set grid xtics ytics"],[legend,false])')
 
-This is it:
-lwdrob@lwdrob-comp:~/Disertatie$ sage
-----------------------------------------------------------------------
-| SAGE Version 2.9.1, Release Date: 2007-12-24                       |
-| Type notebook() for the GUI, and license() for information.        |
-----------------------------------------------------------------------
+/usr/local/src/sage-git/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc in eval(self, code, strip, synchronize, locals, allow_use_file, split_lines, **kwds)
+   1239                 if (split_lines == "nofile" and allow_use_file and
+   1240                         self._eval_using_file_cutoff and len(code) > self._eval_using_file_cutoff):
+-> 1241                     return self._eval_line_using_file(code)
+   1242                 elif split_lines:
+   1243                     return '\n'.join([self._eval_line(L, allow_use_file=allow_use_file, **kwds)
 
-sage:
-maxima.eval('plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,'+
-\
-....:
-'-5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,'+
-\
-....:
-'-2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],'+
-\
-....: '[x,0,n],[plot_format,gnuplot_pipes],[y, 0, 8],[ylabel,"y"],
-[gnuplot_preamble, "set grid xtics ytics"],[legend,false])')
-'sage0'
-sage:
+/usr/local/src/sage-git/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc in _eval_line_using_file(self, line, restart_if_needed)
+    757                 except RuntimeError as msg:
+    758                     raise RuntimeError('%s terminated unexpectedly while reading in a large line'%self)
+--> 759             if "Input/output error" in msg[0]: # This occurs on non-linux machines
+    760                 raise RuntimeError('%s terminated unexpectedly while reading in a large line'%self)
+    761             raise RuntimeError('%s terminated unexpectedly while reading in a large line:\n%s'%(self,msg[0]))
 
-There is a tmp file containing the above cmd:
-$cat /home/lwdrob/.sage/temp/lwdrob_comp/7280/interface/tmp
-sage0 :
-plot2d([-7.5/-0.5*(x-0.5)+8,-7.5/7.5*(x-0.5)+8,-6.5/-0.5*(x-0.5)+8,-6.5/7.5*(x-0.5)+8,-5.5/-0.5*(x-0.5)+8,
--5.5/7.5*(x-0.5)+8,-4.5/-0.5*(x-0.5)+8,-4.5/7.5*(x-0.5)+8,-3.5/-0.5*(x-0.5)+8,-3.5/7.5*(x-0.5)+8,-2.5/-0.5*(x-0.5)+8,
--2.5/7.5*(x-0.5)+8,-1.5/-0.5*(x-0.5)+8,-1.5/7.5*(x-0.5)+8,-0.5/-0.5*(x-0.5)+8,-0.5/7.5*(x-0.5)+8],
-[x,0,n], [plot_format,gnuplot_pipes], [y,0,8],[ylabel,"y"],
-[gnuplot_preamble, "set grid xtics ytics"],[legend,false])$
-
-Best regards,
+IndexError: tuple index out of range
 ```
-
-The problem is that the maxima interface should not be assigning to a variable when using a file to evaluate a large input. 
-
-William