3 files changed, 19 insertions, 1 deletions
diff --git a/tests/ui/ptr_cast_constness.fixed b/tests/ui/ptr_cast_constness.fixed
index 84a36d320f6..79bfae1f7eb 100644
--- a/tests/ui/ptr_cast_constness.fixed
+++ b/tests/ui/ptr_cast_constness.fixed
@@ -100,3 +100,9 @@ fn null_pointers() {
     let _ = external!(ptr::null::<u32>() as *mut u32);
     let _ = external!(ptr::null::<u32>().cast_mut());
 }
+
+fn issue14621() {
+    let mut local = 4;
+    let _ = std::ptr::addr_of_mut!(local).cast_const();
+    //~^ ptr_cast_constness
+}
diff --git a/tests/ui/ptr_cast_constness.rs b/tests/ui/ptr_cast_constness.rs
index ba4eb00b26f..f6590dabd5b 100644
--- a/tests/ui/ptr_cast_constness.rs
+++ b/tests/ui/ptr_cast_constness.rs
@@ -100,3 +100,9 @@ fn null_pointers() {
     let _ = external!(ptr::null::<u32>() as *mut u32);
     let _ = external!(ptr::null::<u32>().cast_mut());
 }
+
+fn issue14621() {
+    let mut local = 4;
+    let _ = std::ptr::addr_of_mut!(local) as *const _;
+    //~^ ptr_cast_constness
+}
diff --git a/tests/ui/ptr_cast_constness.stderr b/tests/ui/ptr_cast_constness.stderr
index 5b2a918c404..0b1644168ff 100644
--- a/tests/ui/ptr_cast_constness.stderr
+++ b/tests/ui/ptr_cast_constness.stderr
@@ -83,5 +83,11 @@ LL |     let _ = inline!(ptr::null::<u32>().cast_mut());
    |
    = note: this error originates in the macro `__inline_mac_fn_null_pointers` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to 13 previous errors
+error: `as` casting between raw pointers while changing only its constness
+  --> tests/ui/ptr_cast_constness.rs:106:13
+   |
+LL |     let _ = std::ptr::addr_of_mut!(local) as *const _;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast_const`, a safer alternative: `std::ptr::addr_of_mut!(local).cast_const()`
+
+error: aborting due to 14 previous errors