1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/overflow/global-cache.rs b/tests/ui/traits/next-solver/overflow/global-cache.rs
new file mode 100644
index 000000000..fe4032ca6
--- /dev/null
+++ b/tests/ui/traits/next-solver/overflow/global-cache.rs
@@ -0,0 +1,23 @@
+// compile-flags: -Znext-solver
+
+// Check that we consider the reached depth of global cache
+// entries when detecting overflow. We would otherwise be unstable
+// wrt to incremental compilation.
+#![recursion_limit = "9"]
+
+trait Trait {}
+
+struct Inc<T>(T);
+
+impl<T: Trait> Trait for Inc<T> {}
+impl Trait for () {}
+
+fn impls_trait<T: Trait>() {}
+
+type Four<T> = Inc<Inc<Inc<Inc<T>>>>;
+
+fn main() {
+    impls_trait::<Four<Four<()>>>();
+    impls_trait::<Four<Four<Four<Four<()>>>>>();
+    //~^ ERROR overflow evaluating the requirement
+}