Also test destructuring assignment.

Author: cjgillot

tests/ui/unsafe/unsafe-fn-deref-ptr.mir.stderr

@@ -15,13 +15,21 @@ LL |     let _: u8 = *p;
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 
 error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
-  --> $DIR/unsafe-fn-deref-ptr.rs:7:12
+  --> $DIR/unsafe-fn-deref-ptr.rs:7:9
+   |
+LL |     _ = *p;
+   |         ^^ dereference of raw pointer
+   |
+   = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
+
+error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
+  --> $DIR/unsafe-fn-deref-ptr.rs:8:12
    |
 LL |     return *p;
    |            ^^ dereference of raw pointer
    |
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0133`.

tests/ui/unsafe/unsafe-fn-deref-ptr.rs

@@ -4,6 +4,7 @@
 fn f(p: *const u8) -> u8 {
     let _ = *p; //~ ERROR dereference of raw pointer is unsafe
     let _: u8 = *p; //~ ERROR dereference of raw pointer is unsafe
+    _ = *p; //~ ERROR dereference of raw pointer is unsafe
     return *p; //~ ERROR dereference of raw pointer is unsafe
 }
 

tests/ui/unsafe/unsafe-fn-deref-ptr.thir.stderr

@@ -15,13 +15,21 @@ LL |     let _: u8 = *p;
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 
 error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
-  --> $DIR/unsafe-fn-deref-ptr.rs:7:12
+  --> $DIR/unsafe-fn-deref-ptr.rs:7:9
+   |
+LL |     _ = *p;
+   |         ^^ dereference of raw pointer
+   |
+   = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
+
+error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
+  --> $DIR/unsafe-fn-deref-ptr.rs:8:12
    |
 LL |     return *p;
    |            ^^ dereference of raw pointer
    |
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0133`.