[Rd] (PR#11281) Bug in R 2.7 for over long lines (crasher+proposed fix!)

[Roger Bivand]

On Tue, 13 May 2008, maechler at stat.math.ethz.ch wrote:

>>>>>> "BDR" == Prof Brian Ripley <ripley at stats.ox.ac.uk>
>>>>>>     on Tue, 13 May 2008 07:32:43 +0100 (BST) writes:
>
>    BDR> This example does not crash in R 2.7.0, R-patched nor
>    BDR> R-devel (r45677) for me (x86_64 F8 Linux.)  It also
>    BDR> does not crash with the CRAN build of R 2.7.0 on
>    BDR> Windows XP.
>
> Neither does it for me in R 2.7.0
> on two x86_64 Linux platforms:
>   Ubuntu 8.04 and Redhat Enterprise 5.1

For the record, it does crash release 2.7.0 on a fully updated RHEL 5 
ix86, on fully updated F7 ix86 (gdb "memory corruption"); on RHEL 4 ix86 
gdb says: "double free or corruption" and points at

#0  0x003bc7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x00baa815 in raise () from /lib/tls/libc.so.6
#2  0x00bac279 in abort () from /lib/tls/libc.so.6
#3  0x00bdecca in __libc_message () from /lib/tls/libc.so.6
#4  0x00be555f in _int_free () from /lib/tls/libc.so.6
#5  0x00be593a in free () from /lib/tls/libc.so.6
#6  0x08169131 in Rf_yyparse () at gram.c:3041
#7  0x08169284 in R_Parse1 (status=0x0) at gram.c:3326
#8  0x08169362 in R_Parse (n=-1, status=0xbfffe9d8, srcfile=0x8b33820)
     at gram.c:3447

This is of course only of historical interest, since 2.8.0 (2008-05-13 
r45678) on RHEL 4 completes source("Features.R") repeatedly with no 
apparent difficulty. So it was a 32-bit problem on some Linux systems.

Roger

>
> Martin
>
>    BDR> On Tue, 13 May 2008, Soeren Sonnenburg wrote:
>
>    >> On Mon, 2008-05-12 at 11:10 +0200,
>    >> maechler at stat.math.ethz.ch wrote:
>    >>> Hi Soeren,
>    >>>>>>>> "SS" == Soeren Sonnenburg <bugreports at nn7.de> on
>    >>>>>>>> Sat, 10 May 2008 05:32:14 +0000 writes:
>    >>>
>    SS> On Sat, 2008-04-26 at 09:38 +0200, Peter Dalgaard wrote:
>    >>> >> bugreports at nn7.de wrote: > OK, I am just sending it
>    >>> here >> too as it looks like r-devel at r-project.org > is
>    >>> not the >> right place:
>    >>> >>>
>    >>> >> I think it was seen there too, just that noone got
>    >>> around >> to reply. In R-bugs, there's a filing system
>    >>> so that it >> won't be completely forgotten...
>    >>>
>    SS> Looks like no one cares about this :(
>    >>>
>    >>> Just "looks like" but it aint...
>    >>>
>    SS> What should I do now? I mean I pointed directly to the
>    SS> bug and did show how it could be fixed....
>    >>>
>    >>> I'm not among the parse experts within R-core, but I
>    >>> think the main problem with your report is that you talk
>    >>> about a crash but do not provide "self-contained
>    >>> reproducible" code to produce such a crash, but just the
>    >>> assertion that you get crashes when working on R <->
>    >>> Swig interaction.  Can you construct simple R code
>    >>> producing the crash?
>    >>
>    >> No. I put however difficult autogenerated (~800k big!) .R
>    >> code that will crash R 2.7 at
>    >> http://nn7.de/debugging/Features.R for everyone to enjoy
>    >> :)
>    >>
>    >> Sourcing it will crash R2.7.0 (without my fix) but not
>    >> 2.8.
>    >>
>    >> Soeren
>    >>
>    >> ______________________________________________
>    >> R-devel at r-project.org mailing list
>    >> https://stat.ethz.ch/mailman/listinfo/r-devel
>    >>
>
>

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no