#9705: trouble with long lines in notebook magma mode
-----------------------------+----------------------------------------------
Reporter: nbruin | Owner: was
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.7
Component: notebook | Keywords:
Author: William Stein | Upstream: N/A
Reviewer: Martin Raum | Merged:
Work_issues: |
-----------------------------+----------------------------------------------
Changes (by newvalueoldvalue):
* status: needs_review => positive_review
* reviewer: => Martin Raum
* author: => William Stein
Old description:
> The following are three cells in a magma-mode notebook worksheet,
> together with output (there should be none). Each is valid magma code,
> but the first one produces an error. The other two examples show that
> shortening the line by changing its content or by placing a line break
> make the error go away.
> {{{
> _<x>:=PolynomialRing(Rationals());
> repeat
> g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where
> b:=Random([-10..10]) where c:=Random([-10..10]);
> until Roots(g) ne [];
> ///
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "_sage_input_6.py", line 10, in <module>
> exec compile(u"print _support_.syseval(magma,
> u'_<x>:=PolynomialRing(Rationals());\\nrepeat\\n
> g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where
> b:=Random([-10..10]) where c:=Random([-10..10]);\\nuntil Roots(g) ne
> [];', __SAGE_TMP_DIR__)" + '\n', '', 'single')
> File "", line 1, in <module>
>
> File "/usr/local/sage/4.4.4/local/lib/python2.6/site-
> packages/sagenb-0.8-py2.6.egg/sagenb/misc/support.py", line 473, in
> syseval
> return system.eval(cmd, sage_globals, locals = sage_globals)
> File "/usr/local/sage/4.4.4/local/lib/python2.6/site-
> packages/sage/interfaces/magma.py", line 523, in eval
> raise RuntimeError, "Error evaluating Magma code.\nIN:%s\nOUT:%s"%(x,
> ans)
> RuntimeError: Error evaluating Magma code.
> IN:_<x>:=PolynomialRing(Rationals());
> repeat
> g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where
> b:=Random([-10..10]) where c:=Random([-10..10]);
> until Roots(g) ne [];
> OUT:
>
> >> load
> "/home/nobody/.sage//temp/ella.cecm.sfu.ca/21960//interface//tmp21960"
> ^
> User error: bad syntax
>
> >> until Roots(g) ne [];
> ^
> User error: bad syntax
> }}}
>
> {{{
> _<x>:=PolynomialRing(Rationals());
> repeat
> g:=x^3+b*x+c where b:=Random([-10..10]) where c:=Random([-10..10]);
> until Roots(g) ne [];
> ///
> }}}
>
> {{{
> _<x>:=PolynomialRing(Rationals());
> repeat
> g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2
> where b:=Random([-10..10]) where c:=Random([-10..10]);
> until Roots(g) ne [];
> ///
> }}}
New description:
The following are three cells in a magma-mode notebook worksheet, together
with output (there should be none). Each is valid magma code, but the
first one produces an error. The other two examples show that shortening
the line by changing its content or by placing a line break make the error
go away.
{{{
_<x>:=PolynomialRing(Rationals());
repeat
g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where
b:=Random([-10..10]) where c:=Random([-10..10]);
until Roots(g) ne [];
///
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_6.py", line 10, in <module>
exec compile(u"print _support_.syseval(magma,
u'_<x>:=PolynomialRing(Rationals());\\nrepeat\\n
g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where b:=Random([-10..10])
where c:=Random([-10..10]);\\nuntil Roots(g) ne [];', __SAGE_TMP_DIR__)" +
'\n', '', 'single')
File "", line 1, in <module>
File "/usr/local/sage/4.4.4/local/lib/python2.6/site-
packages/sagenb-0.8-py2.6.egg/sagenb/misc/support.py", line 473, in
syseval
return system.eval(cmd, sage_globals, locals = sage_globals)
File "/usr/local/sage/4.4.4/local/lib/python2.6/site-
packages/sage/interfaces/magma.py", line 523, in eval
raise RuntimeError, "Error evaluating Magma code.\nIN:%s\nOUT:%s"%(x,
ans)
RuntimeError: Error evaluating Magma code.
IN:_<x>:=PolynomialRing(Rationals());
repeat
g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2 where
b:=Random([-10..10]) where c:=Random([-10..10]);
until Roots(g) ne [];
OUT:
>> load
"/home/nobody/.sage//temp/ella.cecm.sfu.ca/21960//interface//tmp21960"
^
User error: bad syntax
>> until Roots(g) ne [];
^
User error: bad syntax
}}}
{{{
_<x>:=PolynomialRing(Rationals());
repeat
g:=x^3+b*x+c where b:=Random([-10..10]) where c:=Random([-10..10]);
until Roots(g) ne [];
///
}}}
{{{
_<x>:=PolynomialRing(Rationals());
repeat
g:=3*b*x^4+18*c*x^3-6*b^2*x^2-6*b*c*x-b^3-9*c^2
where b:=Random([-10..10]) where c:=Random([-10..10]);
until Roots(g) ne [];
///
}}}
'''Apply:'''
1. trac_9705.patch
--
Comment:
This looks good for; Tests are OK.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9705#comment:6>
Sage <http://www.sagemath.org>
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and MATLAB
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