Ensure that INVALID_CODEBLOCK_ATTRIBUTES lint is emitted

Author: GuillaumeGomez

src/test/rustdoc-ui/check-fail.rs

@@ -1,10 +1,21 @@
 // compile-flags: -Z unstable-options --check
 
 #![deny(missing_docs)]
-//~^ ERROR
-//~^^ ERROR
 #![deny(rustdoc)]
 
+//! ```rust,testharness
+//~^ ERROR
+//! let x = 12;
+//! ```
+
 pub fn foo() {}
 //~^ ERROR
 //~^^ ERROR
+
+/// hello
+//~^ ERROR
+///
+/// ```rust,testharness
+/// let x = 12;
+/// ```
+pub fn bar() {}

src/test/rustdoc-ui/check-fail.stderr

@@ -1,49 +1,57 @@
-error: missing documentation for the crate
-  --> $DIR/check-fail.rs:3:1
+error: missing documentation for a function
+  --> $DIR/check-fail.rs:11:1
    |
-LL | / #![deny(missing_docs)]
-LL | |
-LL | |
-LL | | #![deny(rustdoc)]
-LL | |
-LL | | pub fn foo() {}
-   | |_______________^
+LL | pub fn foo() {}
+   | ^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/check-fail.rs:3:9
    |
 LL | #![deny(missing_docs)]
    |         ^^^^^^^^^^^^
 
-error: missing documentation for a function
-  --> $DIR/check-fail.rs:8:1
+error: missing code example in this documentation
+  --> $DIR/check-fail.rs:11:1
    |
 LL | pub fn foo() {}
-   | ^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^
+   |
+note: the lint level is defined here
+  --> $DIR/check-fail.rs:4:9
+   |
+LL | #![deny(rustdoc)]
+   |         ^^^^^^^
+   = note: `#[deny(missing_doc_code_examples)]` implied by `#[deny(rustdoc)]`
 
-error: missing code example in this documentation
-  --> $DIR/check-fail.rs:3:1
+error: unknown attribute `testharness`. Did you mean `test_harness`?
+  --> $DIR/check-fail.rs:6:1
    |
-LL | / #![deny(missing_docs)]
-LL | |
-LL | |
-LL | | #![deny(rustdoc)]
+LL | / //! ```rust,testharness
 LL | |
-LL | | pub fn foo() {}
-   | |_______________^
+LL | | //! let x = 12;
+LL | | //! ```
+   | |_______^
    |
 note: the lint level is defined here
-  --> $DIR/check-fail.rs:6:9
+  --> $DIR/check-fail.rs:4:9
    |
 LL | #![deny(rustdoc)]
    |         ^^^^^^^
-   = note: `#[deny(missing_doc_code_examples)]` implied by `#[deny(rustdoc)]`
+   = note: `#[deny(invalid_codeblock_attributes)]` implied by `#[deny(rustdoc)]`
+   = help: the code block will either not be tested if not marked as a rust one or the code will be wrapped inside a main function
 
-error: missing code example in this documentation
-  --> $DIR/check-fail.rs:8:1
+error: unknown attribute `testharness`. Did you mean `test_harness`?
+  --> $DIR/check-fail.rs:15:1
    |
-LL | pub fn foo() {}
-   | ^^^^^^^^^^^^^^^
+LL | / /// hello
+LL | |
+LL | | ///
+LL | | /// ```rust,testharness
+LL | | /// let x = 12;
+LL | | /// ```
+   | |_______^
+   |
+   = help: the code block will either not be tested if not marked as a rust one or the code will be wrapped inside a main function
 
 error: aborting due to 4 previous errors