1 files changed, 37 insertions, 0 deletions
diff --git a/tests/ui/consts/issue-90870.rs b/tests/ui/consts/issue-90870.rs
new file mode 100644
index 000000000..676ac73c6
--- /dev/null
+++ b/tests/ui/consts/issue-90870.rs
@@ -0,0 +1,37 @@
+// Regression test for issue #90870.
+
+// run-rustfix
+
+#![allow(dead_code)]
+
+const fn f(a: &u8, b: &u8) -> bool {
+    a == b
+    //~^ ERROR: cannot call non-const operator in constant functions [E0015]
+    //~| HELP: consider dereferencing here
+    //~| HELP: add `#![feature(const_trait_impl)]`
+}
+
+const fn g(a: &&&&i64, b: &&&&i64) -> bool {
+    a == b
+    //~^ ERROR: cannot call non-const operator in constant functions [E0015]
+    //~| HELP: consider dereferencing here
+    //~| HELP: add `#![feature(const_trait_impl)]`
+}
+
+const fn h(mut a: &[u8], mut b: &[u8]) -> bool {
+    while let ([l, at @ ..], [r, bt @ ..]) = (a, b) {
+        if l == r {
+        //~^ ERROR: cannot call non-const operator in constant functions [E0015]
+        //~| HELP: consider dereferencing here
+        //~| HELP: add `#![feature(const_trait_impl)]`
+            a = at;
+            b = bt;
+        } else {
+            return false;
+        }
+    }
+
+    a.is_empty() && b.is_empty()
+}
+
+fn main() {}