Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/ui/uninhabited/uninhabited-patterns.rs b/tests/ui/uninhabited/uninhabited-patterns.rs
new file mode 100644
index 000000000..f1573b6ad
--- /dev/null
+++ b/tests/ui/uninhabited/uninhabited-patterns.rs
@@ -0,0 +1,47 @@
+#![feature(box_patterns)]
+#![feature(never_type)]
+#![feature(exhaustive_patterns)]
+
+
+#![deny(unreachable_patterns)]
+
+mod foo {
+    pub struct SecretlyEmpty {
+        _priv: !,
+    }
+}
+
+struct NotSoSecretlyEmpty {
+    _priv: !,
+}
+
+fn foo() -> Option<NotSoSecretlyEmpty> {
+    None
+}
+
+fn main() {
+    let x: &[!] = &[];
+
+    match x {
+        &[]   => (),
+        &[..] => (),    //~ ERROR unreachable pattern
+    };
+
+    let x: Result<Box<NotSoSecretlyEmpty>, &[Result<!, !>]> = Err(&[]);
+    match x {
+        Ok(box _) => (),    //~ ERROR unreachable pattern
+        Err(&[]) => (),
+        Err(&[..]) => (),   //~ ERROR unreachable pattern
+    }
+
+    let x: Result<foo::SecretlyEmpty, Result<NotSoSecretlyEmpty, u32>> = Err(Err(123));
+    match x {
+        Ok(_y) => (),
+        Err(Err(_y)) => (),
+        Err(Ok(_y)) => (),  //~ ERROR unreachable pattern
+    }
+
+    while let Some(_y) = foo() {
+        //~^ ERROR unreachable pattern
+    }
+}