Fix and bless tests

src/test/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.rs

@@ -1,5 +1,5 @@
 #![feature(unsafe_block_in_unsafe_fn)]
-#![warn(unsafe_op_in_unsafe_fn)]
+#![deny(unsafe_op_in_unsafe_fn)]
 #![deny(unused_unsafe)]
 #![deny(safe_packed_borrows)]
 
@@ -14,18 +14,34 @@ pub struct Packed {
 
 const PACKED: Packed = Packed { data: &0 };
 
-unsafe fn foo() {
+unsafe fn deny_level() {
     unsf();
-    //~^ WARNING call to unsafe function is unsafe and requires unsafe block
+    //~^ ERROR call to unsafe function is unsafe and requires unsafe block
     *PTR;
-    //~^ WARNING dereference of raw pointer is unsafe and requires unsafe block
+    //~^ ERROR dereference of raw pointer is unsafe and requires unsafe block
     VOID = ();
-    //~^ WARNING use of mutable static is unsafe and requires unsafe block
-    &PACKED.data; // the level for the `safe_packed_borrows` lint is ignored
-    //~^ WARNING borrow of packed field is unsafe and requires unsafe block
+    //~^ ERROR use of mutable static is unsafe and requires unsafe block
+    &PACKED.data;
+    //~^ ERROR borrow of packed field is unsafe and requires unsafe block
+    //~| WARNING this was previously accepted by the compiler but is being phased out
 }
 
-unsafe fn bar() {
+// Check that `unsafe_op_in_unsafe_fn` works starting from the `warn` level.
+#[warn(unsafe_op_in_unsafe_fn)]
+#[deny(warnings)]
+unsafe fn warning_level() {
+    unsf();
+    //~^ ERROR call to unsafe function is unsafe and requires unsafe block
+    *PTR;
+    //~^ ERROR dereference of raw pointer is unsafe and requires unsafe block
+    VOID = ();
+    //~^ ERROR use of mutable static is unsafe and requires unsafe block
+    &PACKED.data;
+    //~^ ERROR borrow of packed field is unsafe and requires unsafe block
+    //~| WARNING this was previously accepted by the compiler but is being phased out
+}
+
+unsafe fn explicit_block() {
     // no error
     unsafe {
         unsf();
@@ -35,13 +51,25 @@ unsafe fn bar() {
     }
 }
 
-unsafe fn baz() {
+unsafe fn two_explicit_blocks() {
     unsafe { unsafe { unsf() } }
     //~^ ERROR unnecessary `unsafe` block
 }
 
+#[warn(safe_packed_borrows)]
+unsafe fn warn_packed_borrows() {
+    &PACKED.data;
+    //~^ WARNING borrow of packed field is unsafe and requires unsafe block
+    //~| WARNING this was previously accepted by the compiler but is being phased out
+}
+
+#[allow(safe_packed_borrows)]
+unsafe fn allow_packed_borrows() {
+    &PACKED.data; // `safe_packed_borrows` is allowed, no error
+}
+
 #[allow(unsafe_op_in_unsafe_fn)]
-unsafe fn qux() {
+unsafe fn allow_level() {
     // lint allowed -> no error
     unsf();
     *PTR;
@@ -52,7 +80,26 @@ unsafe fn qux() {
     //~^ ERROR unnecessary `unsafe` block
 }
 
+unsafe fn nested_allow_level() {
+    #[allow(unsafe_op_in_unsafe_fn)]
+    {
+        // lint allowed -> no error
+        unsf();
+        *PTR;
+        VOID = ();
+        &PACKED.data;
+
+        unsafe { unsf() }
+        //~^ ERROR unnecessary `unsafe` block
+    }
+}
+
 fn main() {
-    unsf()
-    //~^ ERROR call to unsafe function is unsafe and requires unsafe function or block
+    unsf();
+    //~^ ERROR call to unsafe function is unsafe and requires unsafe block
+    #[allow(unsafe_op_in_unsafe_fn)]
+    {
+        unsf();
+        //~^ ERROR call to unsafe function is unsafe and requires unsafe function or block
+    }
 }

src/test/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.stderr

@@ -1,18 +1,89 @@
-warning: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:8:5
+error: call to unsafe function is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:18:5
    |
 LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
 note: the lint level is defined here
   --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:2:9
    |
-LL | #![warn(unsafe_op_in_unsafe_fn)]
+LL | #![deny(unsafe_op_in_unsafe_fn)]
    |         ^^^^^^^^^^^^^^^^^^^^^^
    = note: consult the function's documentation for information on how to avoid undefined behavior
 
+error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:20:5
+   |
+LL |     *PTR;
+   |     ^^^^ 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: use of mutable static is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:22:5
+   |
+LL |     VOID = ();
+   |     ^^^^^^^^^ use of mutable static
+   |
+   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
+
+error: borrow of packed field is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:24:5
+   |
+LL |     &PACKED.data;
+   |     ^^^^^^^^^^^^ borrow of packed field
+   |
+note: the lint level is defined here
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:4:9
+   |
+LL | #![deny(safe_packed_borrows)]
+   |         ^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
+   = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior
+
+error: call to unsafe function is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:33:5
+   |
+LL |     unsf();
+   |     ^^^^^^ call to unsafe function
+   |
+note: the lint level is defined here
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:31:8
+   |
+LL | #[deny(warnings)]
+   |        ^^^^^^^^
+   = note: `#[deny(unsafe_op_in_unsafe_fn)]` implied by `#[deny(warnings)]`
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+
+error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:35:5
+   |
+LL |     *PTR;
+   |     ^^^^ 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: use of mutable static is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:37:5
+   |
+LL |     VOID = ();
+   |     ^^^^^^^^^ use of mutable static
+   |
+   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
+
+error: borrow of packed field is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:39:5
+   |
+LL |     &PACKED.data;
+   |     ^^^^^^^^^^^^ borrow of packed field
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
+   = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior
+
 error: unnecessary `unsafe` block
-  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:17:14
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:55:14
    |
 LL |     unsafe { unsafe { unsf() } }
    |     ------   ^^^^^^ unnecessary `unsafe` block
@@ -25,20 +96,49 @@ note: the lint level is defined here
 LL | #![deny(unused_unsafe)]
    |         ^^^^^^^^^^^^^
 
+warning: borrow of packed field is unsafe and requires unsafe block (error E0133)
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:61:5
+   |
+LL |     &PACKED.data;
+   |     ^^^^^^^^^^^^ borrow of packed field
+   |
+note: the lint level is defined here
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:59:8
+   |
+LL | #[warn(safe_packed_borrows)]
+   |        ^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
+   = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior
+
 error: unnecessary `unsafe` block
-  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:25:5
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:79:5
    |
 LL |     unsafe { unsf() }
    |     ^^^^^^ unnecessary `unsafe` block
 
-error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
-  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:30:5
+error: unnecessary `unsafe` block
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:92:9
    |
-LL |     unsf()
+LL |         unsafe { unsf() }
+   |         ^^^^^^ unnecessary `unsafe` block
+
+error[E0133]: call to unsafe function is unsafe and requires unsafe block
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:98:5
+   |
+LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
 
-error: aborting due to 3 previous errors; 1 warning emitted
+error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:102:9
+   |
+LL |         unsf();
+   |         ^^^^^^ call to unsafe function
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+
+error: aborting due to 13 previous errors; 1 warning emitted
 
 For more information about this error, try `rustc --explain E0133`.