Revert "Auto merge of #53508 - japaric:maybe-uninit, r=RalfJung"

This reverts commit c6e3d7fa3113aaa64602507f39d4627c427742ff, reversing
changes made to 4591a245c7eec9f70d668982b1383cd2a6854af5.

1 files changed, 2 insertions, 7 deletions

diff --git a/src/test/debuginfo/nil-enum.rs b/src/test/debuginfo/nil-enum.rs
index ab9c7e2dd27..94377421c0b 100644
--- a/src/test/debuginfo/nil-enum.rs
+++ b/src/test/debuginfo/nil-enum.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// NOTE Instantiating an empty enum is UB. This test may break in the future.
-
 // LLDB can't handle zero-sized values
 // ignore-lldb
 
@@ -27,11 +25,8 @@
 
 #![allow(unused_variables)]
 #![feature(omit_gdb_pretty_printer_section)]
-#![feature(maybe_uninit)]
 #![omit_gdb_pretty_printer_section]
 
-use std::mem::MaybeUninit;
-
 enum ANilEnum {}
 enum AnotherNilEnum {}
 
@@ -40,8 +35,8 @@ enum AnotherNilEnum {}
 // The error from gdbr is expected since nil enums are not supposed to exist.
 fn main() {
     unsafe {
-        let first: ANilEnum = MaybeUninit::uninitialized().into_inner();
-        let second: AnotherNilEnum = MaybeUninit::uninitialized().into_inner();
+        let first: ANilEnum = ::std::mem::zeroed();
+        let second: AnotherNilEnum = ::std::mem::zeroed();
 
         zzz(); // #break
     }