Out-of-bounds third index of multidimensional array causes segfault

[John W. Eaton]

On 23-Apr-2009, Brooks Moses wrote:

| Bug report for Octave 3.0.3 configured for i686-pc-cygwin
| 
| Description:
| -----------
| 
| When I attempt to access an element of a three-dimensional array for set
| of indices for which the third index is out of bounds, I get a segfault.
| 
| Repeat-By:
| ---------
| 
| As per the following session:
| 
| > octave:1> a(2,2,2)=2
| > a =
| > 
| > ans(:,:,1) =
| > 
| >    0   0
| >    0   0
| > 
| > ans(:,:,2) =
| > 
| >    0   0
| >    0   2
| > 
| > 
| > 
| > octave:2> a(3,1,1)
| > error: invalid row index = 3
| > octave:2> a(1,3,1)
| > error: invalid column index = 3
| > octave:2> a(1,1,3)
| > panic: Segmentation fault -- stopping myself...

I can't reproduce this problem with Octave 3.0.3 or the current
development sources on my system (Debian x86_64-pc-linux-gnu).  I see

  octave:1> a(2,2,2)=2
  a =

  ans(:,:,1) =

     0   0
     0   0

  ans(:,:,2) =

     0   0
     0   2



  octave:2> a(3,1,1)
  error: invalid row index = 3
  octave:2> a(1,3,1)
  error: invalid column index = 3
  octave:2> a(1,1,3)
  error: invalid index = 3

with 3.0.3.  With the current development sources the result is similar
but the message is always

  error: A(I): Index exceeds matrix dimension.

jwe