Fix #88155

src/test/ui/rfc-2632-const-trait-impl/issue-88155.rs

@@ -0,0 +1,13 @@
+#![feature(const_fn_trait_bound)]
+#![feature(const_trait_impl)]
+
+pub trait A {
+    fn assoc() -> bool;
+}
+
+pub const fn foo<T: A>() -> bool {
+    T::assoc()
+    //~^ ERROR calls in constant functions are limited
+}
+
+fn main() {}

src/test/ui/rfc-2632-const-trait-impl/issue-88155.stderr

@@ -0,0 +1,9 @@
+error[E0015]: calls in constant functions are limited to constant functions, tuple structs and tuple variants
+  --> $DIR/issue-88155.rs:9:5
+   |
+LL |     T::assoc()
+   |     ^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0015`.