From 9f00d836af0a02110a0a47f4d4c7c7182f04574f Mon Sep 17 00:00:00 2001
From: ouz-a <oguz.agcayazi@gmail.com>
Date: Sun, 24 Jul 2022 13:26:20 +0300
Subject: [PATCH] make sure has_deref is correct

---
 compiler/rustc_middle/src/mir/mod.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compiler/rustc_middle/src/mir/mod.rs b/compiler/rustc_middle/src/mir/mod.rs
index a8408cfe570..f7311ebdabf 100644
--- a/compiler/rustc_middle/src/mir/mod.rs
+++ b/compiler/rustc_middle/src/mir/mod.rs
@@ -1464,6 +1464,8 @@ impl<'tcx> Place<'tcx> {
     /// If MirPhase >= Derefered and if projection contains Deref,
     /// It's guaranteed to be in the first place
     pub fn has_deref(&self) -> bool {
+        // To make sure this is not accidently used in wrong mir phase
+        debug_assert!(!self.projection[1..].contains(&PlaceElem::Deref));
         self.projection.first() == Some(&PlaceElem::Deref)
     }