diff options
| -rw-r--r-- | Lisp/libobjcl.lisp | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/Lisp/libobjcl.lisp b/Lisp/libobjcl.lisp index fda484c..6e8e2f5 100644 --- a/Lisp/libobjcl.lisp +++ b/Lisp/libobjcl.lisp @@ -826,11 +826,12 @@ separating parts by hyphens works nicely in all of the `:INVERT`, (let ((array-pointer (%objcl-class-direct-slots class-ptr count-ptr element-size-ptr))) - (unwind-protect - (loop with element-size = (mem-ref element-size-ptr :unsigned-int) - with count = (mem-ref count-ptr :unsigned-int) - for i from 0 below count - for current-slot = array-pointer - then (inc-pointer current-slot element-size) - collecting (mem-ref current-slot :pointer)) - (foreign-free array-pointer))))) + (unless (null-pointer-p array-pointer) + (unwind-protect + (loop with element-size = (mem-ref element-size-ptr :unsigned-int) + with count = (mem-ref count-ptr :unsigned-int) + for i from 0 below count + for current-slot = array-pointer + then (inc-pointer current-slot element-size) + collecting (mem-ref current-slot :pointer)) + (foreign-free array-pointer)))))) |