diff --git a/tests/ui/cast/issue-112630-1.rs b/tests/ui/cast/issue-112630-1.rs
new file mode 100644
index 0000000000000..c392f3ad4436d
--- /dev/null
+++ b/tests/ui/cast/issue-112630-1.rs
@@ -0,0 +1,6 @@
+fn f(_: B) {}
+//~^ ERROR cannot find type `B` in this scope [E0412]
+
+fn main() {
+    let _ = [0; f as usize];
+}
diff --git a/tests/ui/cast/issue-112630-1.stderr b/tests/ui/cast/issue-112630-1.stderr
new file mode 100644
index 0000000000000..79adb7c6ce6a0
--- /dev/null
+++ b/tests/ui/cast/issue-112630-1.stderr
@@ -0,0 +1,14 @@
+error[E0412]: cannot find type `B` in this scope
+  --> $DIR/issue-112630-1.rs:1:9
+   |
+LL | fn f(_: B) {}
+   |         ^ not found in this scope
+   |
+help: you might be missing a type parameter
+   |
+LL | fn f<B>(_: B) {}
+   |     +++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0412`.
diff --git a/tests/ui/cast/issue-112630.rs b/tests/ui/cast/issue-112630.rs
new file mode 100644
index 0000000000000..abae887b9a490
--- /dev/null
+++ b/tests/ui/cast/issue-112630.rs
@@ -0,0 +1,8 @@
+enum Foo {
+    Bar(B),
+    //~^ ERROR cannot find type `B` in this scope [E0412]
+}
+
+fn main() {
+    let _ = [0; Foo::Bar as usize];
+}
diff --git a/tests/ui/cast/issue-112630.stderr b/tests/ui/cast/issue-112630.stderr
new file mode 100644
index 0000000000000..04910fc557756
--- /dev/null
+++ b/tests/ui/cast/issue-112630.stderr
@@ -0,0 +1,14 @@
+error[E0412]: cannot find type `B` in this scope
+  --> $DIR/issue-112630.rs:2:9
+   |
+LL |     Bar(B),
+   |         ^ not found in this scope
+   |
+help: you might be missing a type parameter
+   |
+LL | enum Foo<B> {
+   |         +++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0412`.