[COMMITTED 123/144] gccrs: add test case to show impl block on ! works

[arthur . cohen]

From: Philip Herron <herron.phi...@googlemail.com>

The resolution with ! was fixed in: 09cfe530f9c this adds a
test case to show the other issue is also fixed.

Fixes #2951

gcc/testsuite/ChangeLog:

        * rust/compile/nr2/exclude: nr2 is crashing here
        * rust/compile/issue-2951.rs: New test.

Signed-off-by: Philip Herron <herron.phi...@googlemail.com>
---
 gcc/testsuite/rust/compile/issue-2951.rs | 13 +++++++++++++
 gcc/testsuite/rust/compile/nr2/exclude   |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/issue-2951.rs

diff --git a/gcc/testsuite/rust/compile/issue-2951.rs 
b/gcc/testsuite/rust/compile/issue-2951.rs
new file mode 100644
index 00000000000..d30a3bf2adf
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-2951.rs
@@ -0,0 +1,13 @@
+#[lang = "sized"]
+pub trait Sized {}
+
+#[lang = "clone"]
+pub trait Clone: Sized {
+    fn clone(&self) -> Self;
+}
+
+impl Clone for ! {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
diff --git a/gcc/testsuite/rust/compile/nr2/exclude 
b/gcc/testsuite/rust/compile/nr2/exclude
index 50781e56b85..c30af607edb 100644
--- a/gcc/testsuite/rust/compile/nr2/exclude
+++ b/gcc/testsuite/rust/compile/nr2/exclude
@@ -253,3 +253,4 @@ issue-3139-1.rs
 issue-3139-2.rs
 issue-3139-3.rs
 issue-3036.rs
+issue-2951.rs
-- 
2.45.2