1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/internal/internal-unstable-const.rs b/src/test/ui/internal/internal-unstable-const.rs
new file mode 100644
index 000000000..4ec2426df
--- /dev/null
+++ b/src/test/ui/internal/internal-unstable-const.rs
@@ -0,0 +1,13 @@
+// Don't allow unstable features in stable functions without `allow_internal_unstable`.
+
+#![stable(feature = "rust1", since = "1.0.0")]
+#![feature(staged_api)]
+#![feature(const_fn_floating_point_arithmetic)]
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_const_stable(feature = "rust1", since = "1.0.0")]
+pub const fn foo() -> f32 {
+    1.0 + 1.0 //~ ERROR const-stable function cannot use `#[feature(const_fn_floating_point_arithmetic)]`
+}
+
+fn main() {}