diff options
Diffstat (limited to 'lisp/emacs-lisp/comp-cstr.el')
| -rw-r--r-- | lisp/emacs-lisp/comp-cstr.el | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/lisp/emacs-lisp/comp-cstr.el b/lisp/emacs-lisp/comp-cstr.el index a1722035963..22d3958aed3 100644 --- a/lisp/emacs-lisp/comp-cstr.el +++ b/lisp/emacs-lisp/comp-cstr.el @@ -474,12 +474,17 @@ DST is returned." (cl-nset-difference (valset neg) (valset pos))))) ;; Range propagation - (setf (range neg) - (when range - (comp-range-negation - (comp-range-union - (comp-range-negation (range neg)) - (range pos))))) + (when range + ;; Handle apart (or (integer 1 1) (not (integer 1 1))) + ;; like cases. + (if (and (range pos) (range neg) + (equal (range pos) (range neg))) + (give-up) + (setf (range neg) + (comp-range-negation + (comp-range-union + (comp-range-negation (range neg)) + (range pos)))))) (if (comp-cstr-empty-p neg) (setf (typeset dst) (typeset pos) |