tests: Move run-pass tests without naming conflicts to ui

src/test/ui/iterators/iter-step-overflow-debug.rs

@@ -0,0 +1,21 @@
+// run-pass
+// ignore-wasm32-bare compiled with panic=abort by default
+// compile-flags: -C debug_assertions=yes
+
+use std::panic;
+
+fn main() {
+    let r = panic::catch_unwind(|| {
+        let mut it = u8::max_value()..;
+        it.next().unwrap(); // 255
+        it.next().unwrap();
+    });
+    assert!(r.is_err());
+
+    let r = panic::catch_unwind(|| {
+        let mut it = i8::max_value()..;
+        it.next().unwrap(); // 127
+        it.next().unwrap();
+    });
+    assert!(r.is_err());
+}