From bug-octave-request at bevo dot che dot wisc dot edu Tue Dec 16 00:44:23 2003
Subject: [] & [] fails
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Paul Kienzle <pkienzle at users dot sourceforge dot net>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Tue, 16 Dec 2003 00:44:13 -0600

On 16-Dec-2003, Paul Kienzle <pkienzle at users dot sourceforge dot net> wrote:

| octave-cvs-2003-12-15 on Debian.
| 
| octave:1> find([]&[])
| error: invalid converstion of boolNDArray to boolMatrix
| octave:1> []&[]
| octave: /home/pkienzle/cvs/octave/src/pr-output.cc:1290: void 
| print_empty_nd_array(std::ostream&, const dim_vector&, bool): Assertion 
| `dims.any_zero ()' failed.
| panic: Aborted -- stopping myself...
| ans = attempting to save variables to `octave-core'...
| save to `octave-core' complete

The following patch should fix the crash.  The find function still
needs to be made N-d aware.

Thanks,

jwe


src/ChangeLog:

2003-12-16  John W. Eaton  <jwe at bevo dot che dot wisc dot edu>

	* ov-base-mat.h (octave_base_matrix::octave_base_matrix (const MT&)):
	If arg has no dimensions, resize to be 0x0.


Index: src/ov-base-mat.h
===================================================================
RCS file: /usr/local/cvsroot/octave/src/ov-base-mat.h,v
retrieving revision 1.28
diff -u -r1.28 ov-base-mat.h
--- src/ov-base-mat.h	25 Nov 2003 05:41:36 -0000	1.28
+++ src/ov-base-mat.h	16 Dec 2003 06:40:09 -0000
 at @ -56,7 +56,11 @@
     : octave_base_value () { }
 
   octave_base_matrix (const MT& m)
-    : octave_base_value (), matrix (m) { }
+    : octave_base_value (), matrix (m)
+  {
+    if (matrix.ndims () == 0)
+      matrix.resize (dim_vector (0, 0));
+  }
 
   octave_base_matrix (const octave_base_matrix& m)
     : octave_base_value (), matrix (m.matrix) { }



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