8 files changed, 182 insertions, 0 deletions
diff --git a/tests/ui/internal-lints/diagnostics_incorrect.rs b/tests/ui/internal-lints/diagnostics_incorrect.rs
new file mode 100644
index 000000000..99f99ffcd
--- /dev/null
+++ b/tests/ui/internal-lints/diagnostics_incorrect.rs
@@ -0,0 +1,15 @@
+// compile-flags: -Z unstable-options
+
+#![feature(rustc_attrs)]
+
+#[rustc_lint_diagnostics]
+//~^ ERROR attribute should be applied to a function
+struct Foo;
+
+impl Foo {
+    #[rustc_lint_diagnostics(a)]
+    //~^ ERROR malformed `rustc_lint_diagnostics`
+    fn bar() {}
+}
+
+fn main() {}
diff --git a/tests/ui/internal-lints/diagnostics_incorrect.stderr b/tests/ui/internal-lints/diagnostics_incorrect.stderr
new file mode 100644
index 000000000..e849ca282
--- /dev/null
+++ b/tests/ui/internal-lints/diagnostics_incorrect.stderr
@@ -0,0 +1,17 @@
+error: malformed `rustc_lint_diagnostics` attribute input
+  --> $DIR/diagnostics_incorrect.rs:10:5
+   |
+LL |     #[rustc_lint_diagnostics(a)]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[rustc_lint_diagnostics]`
+
+error: attribute should be applied to a function definition
+  --> $DIR/diagnostics_incorrect.rs:5:1
+   |
+LL | #[rustc_lint_diagnostics]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |
+LL | struct Foo;
+   | ----------- not a function definition
+
+error: aborting due to 2 previous errors
+
diff --git a/tests/ui/internal-lints/existing_doc_keyword.rs b/tests/ui/internal-lints/existing_doc_keyword.rs
new file mode 100644
index 000000000..7783dc40f
--- /dev/null
+++ b/tests/ui/internal-lints/existing_doc_keyword.rs
@@ -0,0 +1,11 @@
+// compile-flags: -Z unstable-options
+
+#![feature(rustc_private)]
+#![feature(rustdoc_internals)]
+
+#![crate_type = "lib"]
+
+#![deny(rustc::existing_doc_keyword)]
+
+#[doc(keyword = "tadam")] //~ ERROR
+mod tadam {}
diff --git a/tests/ui/internal-lints/existing_doc_keyword.stderr b/tests/ui/internal-lints/existing_doc_keyword.stderr
new file mode 100644
index 000000000..5110b9be0
--- /dev/null
+++ b/tests/ui/internal-lints/existing_doc_keyword.stderr
@@ -0,0 +1,15 @@
+error: found non-existing keyword `tadam` used in `#[doc(keyword = "...")]`
+  --> $DIR/existing_doc_keyword.rs:10:1
+   |
+LL | #[doc(keyword = "tadam")]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: only existing keywords are allowed in core/std
+note: the lint level is defined here
+  --> $DIR/existing_doc_keyword.rs:8:9
+   |
+LL | #![deny(rustc::existing_doc_keyword)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+
diff --git a/tests/ui/internal-lints/query_stability_incorrect.rs b/tests/ui/internal-lints/query_stability_incorrect.rs
new file mode 100644
index 000000000..f478b7332
--- /dev/null
+++ b/tests/ui/internal-lints/query_stability_incorrect.rs
@@ -0,0 +1,15 @@
+// compile-flags: -Z unstable-options
+
+#![feature(rustc_attrs)]
+
+#[rustc_lint_query_instability]
+//~^ ERROR attribute should be applied to a function
+struct Foo;
+
+impl Foo {
+    #[rustc_lint_query_instability(a)]
+    //~^ ERROR malformed `rustc_lint_query_instability`
+    fn bar() {}
+}
+
+fn main() {}
diff --git a/tests/ui/internal-lints/query_stability_incorrect.stderr b/tests/ui/internal-lints/query_stability_incorrect.stderr
new file mode 100644
index 000000000..3f78b39ed
--- /dev/null
+++ b/tests/ui/internal-lints/query_stability_incorrect.stderr
@@ -0,0 +1,17 @@
+error: malformed `rustc_lint_query_instability` attribute input
+  --> $DIR/query_stability_incorrect.rs:10:5
+   |
+LL |     #[rustc_lint_query_instability(a)]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[rustc_lint_query_instability]`
+
+error: attribute should be applied to a function definition
+  --> $DIR/query_stability_incorrect.rs:5:1
+   |
+LL | #[rustc_lint_query_instability]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |
+LL | struct Foo;
+   | ----------- not a function definition
+
+error: aborting due to 2 previous errors
+
diff --git a/tests/ui/internal-lints/rustc_pass_by_value_self.rs b/tests/ui/internal-lints/rustc_pass_by_value_self.rs
new file mode 100644
index 000000000..6ce67dcaf
--- /dev/null
+++ b/tests/ui/internal-lints/rustc_pass_by_value_self.rs
@@ -0,0 +1,54 @@
+// compile-flags: -Z unstable-options
+// NOTE: This test doesn't actually require `fulldeps`
+// so we could instead use it as a `ui` test.
+//
+// Considering that all other `internal-lints` are tested here
+// this seems like the cleaner solution though.
+#![feature(rustc_attrs)]
+#![deny(rustc::pass_by_value)]
+#![allow(unused)]
+
+#[rustc_pass_by_value]
+struct TyCtxt<'tcx> {
+    inner: &'tcx (),
+}
+
+impl<'tcx> TyCtxt<'tcx> {
+    fn by_value(self) {} // OK
+    fn by_ref(&self) {} //~ ERROR passing `TyCtxt<'tcx>` by reference
+}
+
+struct TyS<'tcx> {
+    inner: &'tcx (),
+}
+
+#[rustc_pass_by_value]
+type Ty<'tcx> = &'tcx TyS<'tcx>;
+
+impl<'tcx> TyS<'tcx> {
+    fn by_value(self: Ty<'tcx>) {}
+    fn by_ref(self: &Ty<'tcx>) {} //~ ERROR passing `Ty<'tcx>` by reference
+}
+
+#[rustc_pass_by_value]
+struct Foo;
+
+impl Foo {
+    fn with_ref(&self) {} //~ ERROR passing `Foo` by reference
+}
+
+#[rustc_pass_by_value]
+struct WithParameters<T, const N: usize, M = u32> {
+    slice: [T; N],
+    m: M,
+}
+
+impl<T> WithParameters<T, 1> {
+    fn with_ref(&self) {} //~ ERROR passing `WithParameters<T, 1>` by reference
+}
+
+impl<T> WithParameters<T, 1, u8> {
+    fn with_ref(&self) {} //~ ERROR passing `WithParameters<T, 1, u8>` by reference
+}
+
+fn main() {}
diff --git a/tests/ui/internal-lints/rustc_pass_by_value_self.stderr b/tests/ui/internal-lints/rustc_pass_by_value_self.stderr
new file mode 100644
index 000000000..fb39ed60b
--- /dev/null
+++ b/tests/ui/internal-lints/rustc_pass_by_value_self.stderr
@@ -0,0 +1,38 @@
+error: passing `TyCtxt<'tcx>` by reference
+  --> $DIR/rustc_pass_by_value_self.rs:18:15
+   |
+LL |     fn by_ref(&self) {}
+   |               ^^^^^ help: try passing by value: `TyCtxt<'tcx>`
+   |
+note: the lint level is defined here
+  --> $DIR/rustc_pass_by_value_self.rs:8:9
+   |
+LL | #![deny(rustc::pass_by_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^
+
+error: passing `Ty<'tcx>` by reference
+  --> $DIR/rustc_pass_by_value_self.rs:30:21
+   |
+LL |     fn by_ref(self: &Ty<'tcx>) {}
+   |                     ^^^^^^^^^ help: try passing by value: `Ty<'tcx>`
+
+error: passing `Foo` by reference
+  --> $DIR/rustc_pass_by_value_self.rs:37:17
+   |
+LL |     fn with_ref(&self) {}
+   |                 ^^^^^ help: try passing by value: `Foo`
+
+error: passing `WithParameters<T, 1>` by reference
+  --> $DIR/rustc_pass_by_value_self.rs:47:17
+   |
+LL |     fn with_ref(&self) {}
+   |                 ^^^^^ help: try passing by value: `WithParameters<T, 1>`
+
+error: passing `WithParameters<T, 1, u8>` by reference
+  --> $DIR/rustc_pass_by_value_self.rs:51:17
+   |
+LL |     fn with_ref(&self) {}
+   |                 ^^^^^ help: try passing by value: `WithParameters<T, 1, u8>`
+
+error: aborting due to 5 previous errors
+