Auto merge of #70427 - Centril:rollup-lrcad2c, r=Centril

Rollup of 5 pull requests

Successful merges:

 - #68004 (permit negative impls for non-auto traits)
 - #70385 (Miri nits: comment and var name improvement)
 - #70411 (Fix for #62691: use the largest niche across all fields)
 - #70417 (parser: recover on `...` as a pattern, suggesting `..`)
 - #70424 (simplify match stmt)

Failed merges:

r? @ghost

1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/ui/traits/negative-impls/negative-impls-basic.rs b/src/test/ui/traits/negative-impls/negative-impls-basic.rs
new file mode 100644
index 00000000000..474e0381799
--- /dev/null
+++ b/src/test/ui/traits/negative-impls/negative-impls-basic.rs
@@ -0,0 +1,17 @@
+// A simple test that we are able to create negative impls, when the
+// feature gate is given.
+//
+// run-pass
+
+#![feature(negative_impls)]
+#![allow(dead_code)]
+
+struct TestType;
+
+trait TestTrait {
+    fn dummy(&self) {}
+}
+
+impl !TestTrait for TestType {}
+
+fn main() {}