1 files changed, 6 insertions, 0 deletions
diff --git a/src/liballoc/heap.rs b/src/liballoc/heap.rs
index ab686cb01d6..38216fa5b59 100644
--- a/src/liballoc/heap.rs
+++ b/src/liballoc/heap.rs
@@ -12,6 +12,7 @@
 // FIXME: #13996: mark the `allocate` and `reallocate` return value as `noalias`
 //                and `nonnull`
 
+use core::ptr::RawPtr;
 #[cfg(not(test))] use core::raw;
 #[cfg(not(test))] use util;
 
@@ -69,6 +70,11 @@ pub unsafe fn reallocate_inplace(ptr: *mut u8, size: uint, align: uint,
 /// the value returned by `usable_size` for the requested size.
 #[inline]
 pub unsafe fn deallocate(ptr: *mut u8, size: uint, align: uint) {
+    // FIXME(14395) This is only required for DST ~[T], it should be removed once
+    // we fix that representation to not use null pointers.
+    if ptr.is_null() {
+        return;
+    }
     imp::deallocate(ptr, size, align)
 }