Add regression test for #101363

tests/ui/consts/promoted-const-tuple-variant-101363.rs

@@ -0,0 +1,19 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/101363>.
+//! Borrowing the result of a block expression inside a tuple variant
+//! constructor in a `const` used to fail with E0716; it is now promoted.
+
+//@ check-pass
+
+const OPTIONAL_SLICE_V1: Option<&'static [u8]> = Some(&{
+    let array = [1, 2, 3];
+    array
+});
+
+const OPTIONAL_SLICE_V2: Option<&'static [u8]> = Some {
+    0: &{
+        let array = [1, 2, 3];
+        array
+    },
+};
+
+fn main() {}