gccrs: [gccrs#2987] Patch ICE when deriving Clone and Copy

gcc/rust/ChangeLog:
	* expand/rust-expand-visitor.cc:
	Fix ICE caused by unique_ptr UB and buggy iterator use

gcc/testsuite/ChangeLog:
	* rust/compile/issue-2987.rs:
	Add test for deriving Clone and Copy at the same time

Signed-off-by: Liam Naddell <liam.naddell@mail.utoronto.ca>

1 files changed, 17 insertions, 0 deletions

diff --git a/gcc/testsuite/rust/compile/issue-2987.rs b/gcc/testsuite/rust/compile/issue-2987.rs
new file mode 100644
index 0000000..1ab5fdc
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-2987.rs
@@ -0,0 +1,17 @@
+// { dg-options "-w" } Currently there are a lot of warnings produced from inside clone/copy
+// builtins
+
+#[lang = "copy"]
+trait Copy {}
+
+#[lang = "clone"]
+trait Clone {
+    fn clone(&self) -> Self;
+}
+
+#[derive(Copy)]
+#[derive(Clone)]
+struct Empty;
+
+#[derive(Copy,Clone)]
+struct Empty2;