bug in gunzip / strange line numbers in error message / keyboard weirdness

[Thorsten Meyer]

Hi,

with octave built from the current tip, I get:

octave:1> tmpdir=tmpnam;
octave:2> tmpfile=tmpnam;
octave:3> dummy=1;
octave:4> save(tmpfile, "dummy")
octave:5> mkdir(tmpdir)
ans =  1
octave:6> gzfile=gzip(tmpfile, tmpdir)
gzfile =

{
  [1,1] = /tmp/oct-rZOZFQ/oct-OLjAWz.gz
}

octave:7> gunzip(gzfile)
error: `ext' undefined near line 145 column 30
error: evaluating argument list element number 1
error: evaluating argument list element number 1
error: called from:
error:   /home/thorsten/hg/octave/scripts/miscellaneous/unpack.m at line 145, column 12
error:   /home/thorsten/hg/octave/scripts/miscellaneous/gunzip.m at line 47, column 5


I tried to debug this and added a line containing "ext" to unpack.m. Strangely, even if I place this
command right before the "endfunction" statement of "function unpack" the correct value of ext gets
printed and then the error message is displayed. Also the gz file gets unzipped correctly, so the
bug has to be after the system call. So where is the error located?

Also, the line numbers in the error message seem to be off. line 47 of gunzip.m is the last line
there, and line 145 in unpack.m is way before the system call.

I also tried to add a keyboard command to gunzip.m. But within the debug mode I cannot see any
variables except the function arguments:

keyboard: stopped in /home/thorsten/hg/octave/scripts/miscellaneous/unpack.m
debug> whos
Variables in the current scope:

  Attr Name           Size                     Bytes  Class
  ==== ====           ====                     =====  =====
       argn           1x6                          6  char
   f   files          1x1                         29  cell
   f   outputdir      1x1                          1  char

Total is 8 elements using 36 bytes

debug>


Can someone help?

thanks

Thorsten