diff --git a/tests/ui/delegation/inside-const-body-ice-155300.rs b/tests/ui/delegation/inside-const-body-ice-155300.rs
new file mode 100644
index 000000000000..06addf7e5412
--- /dev/null
+++ b/tests/ui/delegation/inside-const-body-ice-155300.rs
@@ -0,0 +1,18 @@
+#![feature(min_generic_const_args)]
+#![feature(fn_delegation)]
+
+pub struct S<const N: usize>;
+
+impl
+    S<
+        { //~ ERROR: complex const arguments must be placed inside of a `const` block
+            fn foo() {}
+            reuse foo::<> as bar;
+            reuse bar;
+            //~^ ERROR: the name `bar` is defined multiple times
+        },
+    >
+{
+}
+
+fn main() {}
diff --git a/tests/ui/delegation/inside-const-body-ice-155300.stderr b/tests/ui/delegation/inside-const-body-ice-155300.stderr
new file mode 100644
index 000000000000..0d2020c99720
--- /dev/null
+++ b/tests/ui/delegation/inside-const-body-ice-155300.stderr
@@ -0,0 +1,24 @@
+error[E0428]: the name `bar` is defined multiple times
+  --> $DIR/inside-const-body-ice-155300.rs:11:13
+   |
+LL |             reuse foo::<> as bar;
+   |             --------------------- previous definition of the value `bar` here
+LL |             reuse bar;
+   |             ^^^^^^^^^^ `bar` redefined here
+   |
+   = note: `bar` must be defined only once in the value namespace of this block
+
+error: complex const arguments must be placed inside of a `const` block
+  --> $DIR/inside-const-body-ice-155300.rs:8:9
+   |
+LL | /         {
+LL | |             fn foo() {}
+LL | |             reuse foo::<> as bar;
+LL | |             reuse bar;
+LL | |
+LL | |         },
+   | |_________^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0428`.