Re: [cffi-devel] Re: corrupted foreign structure testcase with latest CFFI and LW 4.4.6

On 2006-jun-07, at 00:58, Jack Unrue wrote:

The changes in 060215's version of cffi-lispworks.lisp are that the following have been added:

defun convert-foreign-typed-aref-type defun pointer-and-index compiler macros for %mem-ref and %mem-set

Bingo.

Hopefully this code spelunking can help track down what's happened :-)

Yeah, those compiler macros were calling fli:foreign-typed-aref incorrectly. I remember James and I discussing this optimization and we were both tricked by the documentation that suggests this function takes an array index, not an offset in bytes.

I've pushed a fix to the darcs repository. Thank you for the report and test case. And thank you and Luke for tracking the down the changes that introduced this bug. :-)