Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/ui/regions/regions-creating-enums.rs b/tests/ui/regions/regions-creating-enums.rs
new file mode 100644
index 000000000..6ed68f803
--- /dev/null
+++ b/tests/ui/regions/regions-creating-enums.rs
@@ -0,0 +1,33 @@
+enum Ast<'a> {
+    Num(usize),
+    Add(&'a Ast<'a>, &'a Ast<'a>)
+}
+
+fn build() {
+    let x = Ast::Num(3);
+    let y = Ast::Num(4);
+    let z = Ast::Add(&x, &y);
+    compute(&z);
+}
+
+fn compute(x: &Ast) -> usize {
+    match *x {
+      Ast::Num(x) => { x }
+      Ast::Add(x, y) => { compute(x) + compute(y) }
+    }
+}
+
+fn map_nums<'a,'b, F>(x: &Ast, f: &mut F) -> &'a Ast<'b> where F: FnMut(usize) -> usize {
+    match *x {
+      Ast::Num(x) => {
+        return &Ast::Num((*f)(x)); //~ ERROR cannot return reference to temporary value
+      }
+      Ast::Add(x, y) => {
+        let m_x = map_nums(x, f);
+        let m_y = map_nums(y, f);
+        return &Ast::Add(m_x, m_y);  //~ ERROR cannot return reference to temporary value
+      }
+    }
+}
+
+fn main() {}