#11617: sending any large string at all to the gp PARI pexpect interface fails
--------------------------+-------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: critical | Milestone: sage-4.7.2
Component: interfaces | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Description changed by was:
Old description:
> In Sage-4.7 (on Linux and OS X), we have:
>
> {{{
> sage: '***' in gp.eval('a='+str(range(10^3)))
> False
> sage: '***' in gp.eval('a='+str(range(10^4)))
> False
> sage: '***' in gp.eval('a='+str(range(10^5)))
> False
> sage: '***' in gp.eval('a='+str(range(10^6)))
> True
> }}}
>
> The "***" appearing in the output means that an error occurs. Looking
> further we find:
>
> {{{
> sage: print gp.eval('a='+str(range(10^6)))
> *** [...] at: read("/scratch/wstei
> *** ^--------------------
> *** in function read: read("/scratch/wstei
> ...
> *** read: error opening input file:
> `/scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449'.
> }}}
> Shockingly, looking at the file we are reading it we find that it
> contains:
> {{{
> sage: !more
> /scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449
> read("/scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449")
> }}}
>
> So, instead of writing the long string we are supposed to read in, the
> file contains a single line asking to read in itself!
New description:
In Sage-4.7 (on Linux and OS X), we have:
{{{
sage: '***' in gp.eval('a='+str(range(10^3)))
False
sage: '***' in gp.eval('a='+str(range(10^4)))
False
sage: '***' in gp.eval('a='+str(range(10^5)))
False
sage: '***' in gp.eval('a='+str(range(10^6)))
True
}}}
The "***" appearing in the output means that an error occurs. Looking
further we find:
{{{
sage: print gp.eval('a='+str(range(10^6)))
*** [...] at: read("/scratch/wstei
*** ^--------------------
*** in function read: read("/scratch/wstei
...
*** read: error opening input file:
`/scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449'.
}}}
Shockingly, looking at the file we are reading it we find that it
contains:
{{{
sage: !more
/scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449
read("/scratch/wstein/sage//temp/mod.math.washington.edu/17446//interface//tmp17449")
}}}
So, instead of writing the long string we are supposed to read in, the
file contains a single line asking to read in itself!
NOTE: This bug was originally observed by Zhibin Liang.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11617#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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