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, 39 insertions, 0 deletions

diff --git a/src/test/ui/uninhabited/uninhabited-matches-feature-gated.rs b/src/test/ui/uninhabited/uninhabited-matches-feature-gated.rs
new file mode 100644
index 000000000..e804afcf9
--- /dev/null
+++ b/src/test/ui/uninhabited/uninhabited-matches-feature-gated.rs
@@ -0,0 +1,39 @@
+use std::mem::zeroed;
+enum Void {}
+
+fn main() {
+    let x: Result<u32, &'static Void> = Ok(23);
+    let _ = match x {   //~ ERROR non-exhaustive
+        Ok(n) => n,
+    };
+
+    // This is pretty much instant UB. However, we have no choice -- we need to
+    // test matching on a reference to `&Void`; we cannot do anything other than
+    // just accept the fact that this is UB if `main` did run, but it doesn't;
+    // this test only checks that these are feature-gated.
+    let x: &Void = unsafe { zeroed() };
+    let _ = match x {}; //~ ERROR non-exhaustive
+
+    let x: (Void,) = unsafe { zeroed() };
+    let _ = match x {}; //~ ERROR non-exhaustive
+
+    let x: [Void; 1] = unsafe { zeroed() };
+    let _ = match x {}; //~ ERROR non-exhaustive
+
+    let x: &[Void] = unsafe { zeroed() };
+    let _ = match x {   //~ ERROR non-exhaustive
+        &[] => (),
+    };
+
+    let x: Void = unsafe { zeroed() };
+    let _ = match x {}; // okay
+
+    let x: Result<u32, Void> = Ok(23);
+    let _ = match x {   //~ ERROR non-exhaustive
+        Ok(x) => x,
+    };
+
+    let x: Result<u32, Void> = Ok(23);
+    let Ok(x) = x;
+    //~^ ERROR refutable
+}