Order of evaluation bug involving LOGEQV and VALUES in compiled code

(defun foo (a) (declare (type fixnum a)) (logeqv (values a) (setf a 1)))

After compiling,

(foo 2) ==> -1

when (logeqv 2 1) ==> -4

The VALUES call is needed for the bug to manifest.

This is in ECL 16.1.3 under Linux.