#13211: Upgrade GAP to 4.5.6
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Reporter: kini | Owner:
tbd
Type: enhancement | Status:
needs_work
Priority: major | Milestone:
sage-5.5
Component: packages | Resolution:
Keywords: | Work issues:
Report Upstream: Completely fixed; Fix reported upstream | Reviewers:
Dmitrii Pasechnik
Authors: Volker Braun | Merged in:
Dependencies: #13123, #13579 | Stopgaps:
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Comment (by dimpase):
Replying to [comment:165 jdemeyer]:
> Now that I know what the problem is, reproducing the Segmentation Fault
is trivial. Within a Sage shell:
> {{{
> (sage-sh) jdemeyer@sage:sage-5.5.beta2$ gap &>/dev/full
> Segmentation fault
> }}}
This is not the complete story. First off, you need to run with -T, which
is meant to suppress the usual interactive behavour, and this is the
option using which the orphans in question arise. In fact, it is because
{{{stderr}}} is full, not because {{{stdout}}} is full.
{{{
(sage-sh) dima@sage$ gap -T >/dev/full
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
Syntax error: ; expected
^
Error, Cannot write to file descriptor 1, see 'LastSystemError();'
(sage-sh) dima@sage$
}}}
Thus if the {{{stderr}}} is OK, it sort of works (the {{{Syntax error;}}}
is quite weird though, and might be an indication of a "more real" bug).
By the way, {{{gap-4.4}}} just hangs in this situation.
As we talk about the situation with -T on, we can patch, say,
{{{ErrorQuit}}} for this case to print to {{{stderr}}} and quit
immediately. This will not fix this completely, but at least it will make
sure that with -T option the behaviour is as it should be.
An alternative is to change Sage so that GAPs {{{stderr}}} does not get
redirected. I don't know how well this will work, though.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13211#comment:170>
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