yet another DLD question

[John W. Eaton]

On  4-Nov-1998, Andy+Alison Adler <address@hidden> wrote:

| I've got this bizarre bug:
| 
| if I put my code
| 
| [SNIP]
|    Octave_map As;
| [SNIP]
|    ColumnVector coefV=  As["coef"] . vector_value();
|    double * coef =  coefV . fortran_vec();
|    for ( int i= 0; i<  nnz; i++ )
|       printf("a= %f\n", *(coef+i));
| [SNIP]
| 
| then it works fine, giving output
| 
| a= 1.000000
| a= 2.000000
| a= 3.000000 
| etc.
| 
| 
| However, if I try to abbreviate by putting
| 
| [SNIP]
|    double * coef =  As["coef"] . vector_value() . fortran_vec();
|    for ( int i= 0; i<  nnz; i++ )
|       printf("a= %f\n", *(coef+i));
| [SNIP]
| 
| then the first value printed is always wrong
| a= 39.399666
| a=  1.000000
| a=  2.000000  
| 
| (the first value is often 39.??? but is sometimes different)
| 
| MY QUESTION IS:
| 
| is As["coef"] . vector_value() . fortran_vec() illegal?
| or is this a bug?
| or am I doing something wrong

I think either approach should work.  I created a simple test example
and it worked fine.  Perhaps there is another problem in your code
that causes a memory overwrite.  Can you please send me a complete
example that demonstrates the problem?

Thanks,

jwe