Re: Octave 3.3.54 snapshot available for ftp

[John W. Eaton]

On 23-Nov-2010, Fredrik Lingvall wrote:

| Thanks. I got a bit further now. It fails in the sparse doc stuff now
| but this can be related to how the sparse libs are build.
| 
| I get this error on the MacBook Pro (i7, Westmere):
| 
| <snip>
| 
| umn.edu/~saad/software/SPARSKIT/paper.ps[]| |
| [373] [374] [375] [376] [377] [378] [379]
| (spmatrix.eps
| )
| [380]
| (gplot.eps
| )
| [381] [382] [383] [384] [385]
| (spmatrix.eps
| )
| [386]
| (spchol.eps
| ./sparse.texi:1075: Could not open file spchol.eps, ignoring it.
| @epsfgetbb ...Could not open file #1, ignoring it}
|                                                   @else address@hidden @other
| = 1...
| 
| @next #1->@epsfgetbb {#1}
|                          @epsfsetgraph {#1}
| @imagexxx ...ysize address@hidden @fi @epsfbox {#1.eps}
|                                                   @fi @ifimagevmode
| @medskip...
| 
| @image ...true @fi @else @imagexxx #1,,,,,@finish
|                                                   @fi
| <argument> @hfil @ignorespaces @image {spchol,4in}
|                                                   @unskip @hfil
| @next #1->@line address@hidden @leftskip #1
|                                    @kern @rightskip }
| l.1075 @center @image{spchol,4in}
|                                 
| ?
| 
| <must press return here to continue>
| 
| <snip>
| 
| [695] [696] [697] [698] [699] [700] [701] [702] [703] [704] [705]))
| (./op-idx.texi (Operator Index) [706] (./octave.ops)) [707]
| Overfull \vbox (10.87947pt too high) has occurred while \output is active
| [708] )
| Output written on octave.dvi (722 pages, 2651144 bytes).
| Transcript written on octave.log.
| /usr/bin/texi2dvi: etex exited with bad status, quitting.
| make[3]: *** [octave.dvi] Error 1
| make[3]: Leaving directory `/root/software/octave/hg/octave/doc/interpreter'
| make[2]: *** [all-recursive] Error 1
| make[2]: Leaving directory `/root/software/octave/hg/octave/doc'
| make[1]: *** [all-recursive] Error 1
| make[1]: Leaving directory `/root/software/octave/hg/octave'
| make: *** [all] Error 2
| 
| and this error on the Xeon (E5504, Nehalem) server:
| 
| <snip>
| 
| ../../run-octave -f -q -H -p . --eval "plotimages ('plot3', 'eps');"
| 
| ../../run-octave -f -q -H -p . --eval "plotimages ('extended', 'eps');"
| 
| ../../run-octave -f -q -H -p . --eval "sparseimages ('gplot', 'eps');"
| 
| ../../run-octave -f -q -H -p . --eval "sparseimages ('grid', 'eps');"
| 
| ../../run-octave -f -q -H -p . --eval "sparseimages ('spmatrix', 'eps');"
| 
| ../../run-octave -f -q -H -p . --eval "sparseimages ('spchol', 'eps');"
| panic: Segmentation fault -- stopping myself...
| attempting to save variables to `octave-core'...
| save to `octave-core' complete
| make[3]: *** [spchol.eps] Segmentation fault
| make[3]: Leaving directory `/root/software/octave/hg/octave/doc/interpreter'
| make[2]: *** [all-recursive] Error 1
| make[2]: Leaving directory `/root/software/octave/hg/octave/doc'
| make[1]: *** [all-recursive] Error 1
| make[1]: Leaving directory `/root/software/octave/hg/octave'
| make: *** [all] Error 2
| 
| 
| This (taken from doc/interpreter/sparseimages.m) works though:
| 
| octave:9> n=100; a = 10*speye(n) +
| sparse(1:n,ceil([1:n]/2),1,n,n)+sparse(ceil([1:n]/2),1:n,1,n,n);
| octave:10> [r2,p2,q2]=chol(a);
| octave:11> whos
| Variables in the current scope:
| 
|   Attr Name        Size                     Bytes  Class
|   ==== ====        ====                     =====  =====
|        a         100x100                     5592  double
|        n           1x1                          8  double
|        nm          1x1                          8  double
|        p2          1x1                          8  double
|        q2        100x100                     2408  double
|        r1         20x20                      2088  double
|        r2        100x100                     3992  double
| 
| Total is 721 elements using 14104 bytes

I don't see this problem.  Building with --enable-64 works for me on a
Debian AMD64 system.

Maybe it is related to this reported bug:

  https://savannah.gnu.org/bugs/?31734

?  I have not investigated the problem.  I don't really understand the
sparse matrix code in Octave very well.

If you run

  ../../run-octave -f -q -H -p . --eval "sparseimages ('spchol', 'eps');"

separate from make, does it crash?  What if you try

  ../../run-octave -g -f -q -H -p . --eval "sparseimages ('spchol', 'eps');"

That should run the same command but with Octave executing under gdb.
Then you could get a backtrace that might give some clues about the
crash.

jwe