Merge crate collections into alloc

src/liballoc/raw_vec.rs

@@ -44,6 +44,7 @@ use core::cmp;
 /// `shrink_to_fit`, and `from_box` will actually set RawVec's private capacity
 /// field. This allows zero-sized types to not be special-cased by consumers of
 /// this type.
+#[allow(missing_debug_implementations)]
 pub struct RawVec<T> {
     ptr: Unique<T>,
     cap: usize,