Added assert() checks in pop-functions.

1 files changed, 2 insertions, 2 deletions

diff --git a/include/stc/cdeq.h b/include/stc/cdeq.h
index e73d13b7..423464ac 100644
--- a/include/stc/cdeq.h
+++ b/include/stc/cdeq.h
@@ -97,7 +97,7 @@ STC_INLINE _cx_value*   _cx_memb(_front)(const _cx_self* self) { return self->da
 STC_INLINE _cx_value*   _cx_memb(_back)(const _cx_self* self)
                             { return self->data + cdeq_rep_(self)->size - 1; }
 STC_INLINE void         _cx_memb(_pop_front)(_cx_self* self) // == _pop() when _i_queue
-                            { i_keydrop(self->data); ++self->data; --cdeq_rep_(self)->size; }
+                            { assert(!_cx_memb(_empty)(self)); i_keydrop(self->data); ++self->data; --cdeq_rep_(self)->size; }
 
 STC_INLINE _cx_iter _cx_memb(_begin)(const _cx_self* self) {
     size_t n = cdeq_rep_(self)->size;
@@ -118,7 +118,7 @@ STC_INLINE _cx_iter _cx_memb(_advance)(_cx_iter it, isize_t n)
 STC_INLINE size_t       _cx_memb(_index)(const _cx_self* cx, _cx_iter it)
                             { return it.ref - cx->data; }
 STC_INLINE void         _cx_memb(_pop_back)(_cx_self* self)
-                            { _cx_value* p = &self->data[--cdeq_rep_(self)->size]; i_keydrop(p); }
+                            { assert(!_cx_memb(_empty)(self)); _cx_value* p = &self->data[--cdeq_rep_(self)->size]; i_keydrop(p); }
 
 STC_INLINE const _cx_value* _cx_memb(_at)(const _cx_self* self, const size_t idx) {
     assert(idx < cdeq_rep_(self)->size);  return self->data + idx;