2 files changed, 10 insertions, 19 deletions
diff --git a/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.rs b/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.rs
index c857eb459b8..c9e93174e20 100644
--- a/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.rs
+++ b/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.rs
@@ -1,18 +1,14 @@
-// Dropck shouldn't hit a recursion limit from checking `S<u32>` since it has
-// no free regions or type parameters.
-// Codegen however, has to error for the infinitely many `drop_in_place`
-// functions it has been asked to create.
-
-// build-fail
-// normalize-stderr-test: ".nll/" -> "/"
-// compile-flags: -Zmir-opt-level=0
+// `S` is infinitely recursing so it's not possible to generate a finite
+// drop impl (ignoring polymorphization).
+//
+// Dropck should therefore detect that this is the case and eagerly error.
 
 struct S<T> {
     t: T,
     s: Box<S<fn(u: T)>>,
 }
 
-fn f(x: S<u32>) {}
+fn f(x: S<u32>) {} //~ ERROR overflow while adding drop-check rules for S<u32>
 
 fn main() {
     // Force instantiation.
diff --git a/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.stderr b/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.stderr
index d749ee00c22..1da29be43db 100644
--- a/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.stderr
+++ b/src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.stderr
@@ -1,15 +1,10 @@
-error: reached the recursion limit while instantiating `std::ptr::drop_in_place::<S<fn(f...)))))))))))))))))))))))))))))>))`
-  --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+error[E0320]: overflow while adding drop-check rules for S<u32>
+  --> $DIR/issue-38591-non-regular-dropck-recursion.rs:11:6
    |
-LL | pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | fn f(x: S<u32>) {}
+   |      ^
    |
-note: `std::ptr::drop_in_place` defined here
-  --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL
-   |
-LL | pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   = note: the full type name has been written to '$TEST_BUILD_DIR/recursion/issue-38591-non-regular-dropck-recursion/issue-38591-non-regular-dropck-recursion.long-type.txt'
+   = note: overflowed on S<fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(fn(u32)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))>
 
 error: aborting due to previous error