Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/test/ui/uninhabited/privately-uninhabited-mir-call.rs b/src/test/ui/uninhabited/privately-uninhabited-mir-call.rs
new file mode 100644
index 000000000..2764bb563
--- /dev/null
+++ b/src/test/ui/uninhabited/privately-uninhabited-mir-call.rs
@@ -0,0 +1,29 @@
+// Verifies that MIR building for a call expression respects
+// privacy when checking if a call return type is uninhabited.
+
+pub mod widget {
+    enum Unimplemented {}
+    pub struct Widget(Unimplemented);
+
+    impl Widget {
+        pub fn new() -> Widget {
+            todo!();
+        }
+    }
+
+    pub fn f() {
+        let x: &mut u32;
+        Widget::new();
+        // Ok. Widget type returned from new is known to be uninhabited
+        // and the following code is considered unreachable.
+        *x = 1;
+    }
+}
+
+fn main() {
+    let y: &mut u32;
+    widget::Widget::new();
+    // Error. Widget type is not known to be uninhabited here,
+    // so the following code is considered reachable.
+    *y = 2; //~ ERROR E0381
+}