Add 81246

Issue: rust-lang/rust#81246

Author: fanninpm

ices/81246.rs

@@ -0,0 +1,9 @@
+#![feature(allocator_api)]
+
+fn ice() -> Box<(), &'static std::alloc::Global> {
+    todo!()
+}
+
+fn main() {
+    ice();
+}