Re: quadl crashes on evaluation

[rmcd]

David Bateman-3 wrote:
> 
> It shouldn't crash as the issue here is only that the recursion limit of 
> Octave is met. I suspect that cygwin doesn't like a 256 deep recursion 
> as set by default with Octave and you should try something like
> 
> max_recursion_depth (128)
> quadl (@(x) x .* sin (1 ./ x) .* sqrt (abs (1 - x)), 0, 3)
> 
> and see if it still crashes. If it doesn't, I'd suggest that the cygwin 
> maximum recursion depth be reduced.
> 

You're correct. Octave does not crash if I set max_recursion_depth to 128. 

If I could ask another question about this example, the first time I call
quadl I get the following errors (this doesn't happen with quad and only the
first time with quadl):

octave:1> quadl ("f",0,3)
error: `x' undefined near line 2 column 5
error: evaluating binary operator `.*' near line 2, column 7
error: evaluating binary operator `.*' near line 2, column 23
error: evaluating assignment expression near line 2, column 3
error: called from `f' in file `/cygdrive/d/progdata/matlab/rmcd/test/f.m'
error: evaluating argument list element number 1
error: evaluating assignment expression near line 126, column 5
error: called from `quadl' in file
`/usr/share/octave/3.0.2/m/general/quadl.m'

The function file looks like this:

function y = f (x)
y = x .* sin (1 ./ x) .* sqrt (abs (1 - x));
endfunction

It seems to be some kind of initialization error. Not a big deal, but I'm
curious.
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