[plt-scheme] Re: A segmentation fault on OS X Intel

Adding a display line such as below is enough to stop a segmentation
fault.  Also I see a segfault most of the time, but not all of the
time.  I'm now wondering if switching between the standard FP pipeline
and the SIMD one has some implications that aren't accounted for in
the FFI?


> (module dgemv-test mzscheme
>
>   ;; Causes segmentation fault with this line
>   (require
>    (planet "srfi-4-comprehensions.ss" ("wmfarr" "srfi-4-comprehensions.plt" 1))
>    (planet "all.ss" ("wmfarr" "plt-linalg.plt" 1)))
>
     (display 'foo) ;; this stops the seg fault
>
>   (display
>    (f64vector-matrix-mul
>     (f64vector 1. 0. 0. 0. 0. 0. 0. 0. 0. 0.)
>     (matrix 10 10   0 0 0 0 0 0 0 0 0 1
>                     1 0 0 0 0 0 0 0 0 0
>                     0 1 0 0 0 0 0 0 0 0
>                     0 0 1 0 0 0 0 0 0 0
>                     0 0 0 1 0 0 0 0 0 0
>                     0 0 0 0 1 0 0 0 0 0
>                     0 0 0 0 0 1 0 0 0 0
>                     0 0 0 0 0 0 1 0 0 0
>                     0 0 0 0 0 0 0 1 0 0
>                     0 0 0 0 0 0 0 0 1 0)))
>
>   )
>
> More diagnosis to follow later.  This is weird weird weird!
>
> N.
>