Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / src / test / ui / traits / issue-22019.rs

diff --git a/src/test/ui/traits/issue-22019.rs b/src/test/ui/traits/issue-22019.rs
new file mode 100644 (file)
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--- /dev/null
+++ b/src/test/ui/traits/issue-22019.rs
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+// run-pass
+// Test an issue where global caching was causing free regions from
+// distinct scopes to be compared (`'g` and `'h`). The only important
+// thing is that compilation succeeds here.
+
+// pretty-expanded FIXME #23616
+
+#![allow(missing_copy_implementations)]
+#![allow(unused_variables)]
+
+use std::borrow::ToOwned;
+
+pub struct CFGNode;
+
+pub type Node<'a> = &'a CFGNode;
+
+pub trait GraphWalk<'c, N> {
+    /// Returns all the nodes in this graph.
+    fn nodes(&'c self) where [N]:ToOwned<Owned=Vec<N>>;
+}
+
+impl<'g> GraphWalk<'g, Node<'g>> for u32
+{
+    fn nodes(&'g self) where [Node<'g>]:ToOwned<Owned=Vec<Node<'g>>>
+    { loop { } }
+}
+
+impl<'h> GraphWalk<'h, Node<'h>> for u64
+{
+    fn nodes(&'h self) where [Node<'h>]:ToOwned<Owned=Vec<Node<'h>>>
+    { loop { } }
+}
+
+fn main()  { }