8 files changed, 53 insertions, 14 deletions
diff --git a/tests/ui/mir/issue-101844.rs b/tests/ui/mir/issue-101844.rs
index da8a25f5f..72ceefa4f 100644
--- a/tests/ui/mir/issue-101844.rs
+++ b/tests/ui/mir/issue-101844.rs
@@ -67,7 +67,7 @@ where
     MS::Item: Into<()>,
 {
     // Error: Apparently Balance::new doesn't exist during MIR validation
-    let _ = ImplShoulExist::<MS, ()>::access_fn(ms);
+    ImplShoulExist::<MS, ()>::access_fn(ms);
 }
 
 fn main() {}
diff --git a/tests/ui/mir/issue-112269.rs b/tests/ui/mir/issue-112269.rs
new file mode 100644
index 000000000..8b9b16647
--- /dev/null
+++ b/tests/ui/mir/issue-112269.rs
@@ -0,0 +1,9 @@
+pub fn main() {
+    const x: i32 = 4;
+    let x: i32 = 3;
+    //~^ ERROR refutable pattern in local binding
+
+    const y: i32 = 3;
+    let y = 4;
+    //~^ ERROR refutable pattern in local binding
+}
diff --git a/tests/ui/mir/issue-112269.stderr b/tests/ui/mir/issue-112269.stderr
new file mode 100644
index 000000000..f5b796027
--- /dev/null
+++ b/tests/ui/mir/issue-112269.stderr
@@ -0,0 +1,31 @@
+error[E0005]: refutable pattern in local binding
+  --> $DIR/issue-112269.rs:3:9
+   |
+LL |     let x: i32 = 3;
+   |         ^
+   |         |
+   |         patterns `i32::MIN..=3_i32` and `5_i32..=i32::MAX` not covered
+   |         missing patterns are not covered because `x` is interpreted as a constant pattern, not a new variable
+   |         help: introduce a variable instead: `x_var`
+   |
+   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
+   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
+   = note: the matched value is of type `i32`
+
+error[E0005]: refutable pattern in local binding
+  --> $DIR/issue-112269.rs:7:9
+   |
+LL |     let y = 4;
+   |         ^
+   |         |
+   |         patterns `i32::MIN..=2_i32` and `4_i32..=i32::MAX` not covered
+   |         missing patterns are not covered because `y` is interpreted as a constant pattern, not a new variable
+   |         help: introduce a variable instead: `y_var`
+   |
+   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
+   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
+   = note: the matched value is of type `i32`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0005`.
diff --git a/tests/ui/mir/issue-80949.rs b/tests/ui/mir/issue-80949.rs
index 7e34a4f5c..96b63e93a 100644
--- a/tests/ui/mir/issue-80949.rs
+++ b/tests/ui/mir/issue-80949.rs
@@ -28,7 +28,7 @@ fn may_panic<X>(_: X) { }
 fn main() {
     let dyn_trait = make_dyn_trait(&());
     let storage = vec![()];
-    let _x = may_panic(());
+    may_panic(());
     let storage_ref = &storage;
     diff(dyn_trait, storage_ref);
 }
diff --git a/tests/ui/mir/issue66339.rs b/tests/ui/mir/issue66339.rs
index 2507af38c..f25afd560 100644
--- a/tests/ui/mir/issue66339.rs
+++ b/tests/ui/mir/issue66339.rs
@@ -5,7 +5,7 @@
 
 fn foo() {
     let bar = |_| { };
-    let _ = bar("a");
+    bar("a");
 }
 
 fn main() {
diff --git a/tests/ui/mir/ssa-analysis-regression-50041.rs b/tests/ui/mir/ssa-analysis-regression-50041.rs
index ebc3e2f8c..534f1c465 100644
--- a/tests/ui/mir/ssa-analysis-regression-50041.rs
+++ b/tests/ui/mir/ssa-analysis-regression-50041.rs
@@ -13,13 +13,10 @@ struct Unique<T: ?Sized>(NonNull<T>);
 pub struct Box<T: ?Sized>(Unique<T>);
 
 impl<T: ?Sized> Drop for Box<T> {
-    fn drop(&mut self) {}
-}
-
-#[lang = "box_free"]
-#[inline(always)]
-unsafe fn box_free<T: ?Sized>(ptr: Unique<T>) {
-    dealloc(ptr.0.0)
+    #[inline(always)]
+    fn drop(&mut self) {
+        dealloc(self.0.0.0)
+    }
 }
 
 #[inline(never)]
diff --git a/tests/ui/mir/thir-constparam-temp.rs b/tests/ui/mir/thir-constparam-temp.rs
index cdc5910b3..7eedc325d 100644
--- a/tests/ui/mir/thir-constparam-temp.rs
+++ b/tests/ui/mir/thir-constparam-temp.rs
@@ -3,7 +3,9 @@
 #![feature(adt_const_params)]
 #![allow(incomplete_features)]
 
-#[derive(PartialEq, Eq)]
+use std::marker::ConstParamTy;
+
+#[derive(PartialEq, Eq, ConstParamTy)]
 struct Yikes;
 
 impl Yikes {
diff --git a/tests/ui/mir/thir-constparam-temp.stderr b/tests/ui/mir/thir-constparam-temp.stderr
index b77d67e08..d50747e54 100644
--- a/tests/ui/mir/thir-constparam-temp.stderr
+++ b/tests/ui/mir/thir-constparam-temp.stderr
@@ -1,5 +1,5 @@
 warning: taking a mutable reference to a `const` item
-  --> $DIR/thir-constparam-temp.rs:14:5
+  --> $DIR/thir-constparam-temp.rs:16:5
    |
 LL |     YIKES.mut_self()
    |     ^^^^^^^^^^^^^^^^
@@ -7,12 +7,12 @@ LL |     YIKES.mut_self()
    = note: each usage of a `const` item creates a new temporary
    = note: the mutable reference will refer to this temporary, not the original `const` item
 note: mutable reference created due to call to this method
-  --> $DIR/thir-constparam-temp.rs:10:5
+  --> $DIR/thir-constparam-temp.rs:12:5
    |
 LL |     fn mut_self(&mut self) {}
    |     ^^^^^^^^^^^^^^^^^^^^^^
 note: `const` item defined here
-  --> $DIR/thir-constparam-temp.rs:13:8
+  --> $DIR/thir-constparam-temp.rs:15:8
    |
 LL | fn foo<const YIKES: Yikes>() {
    |        ^^^^^^^^^^^^^^^^^^