Update miri submodule

compiler/rustc_middle/src/mir/mod.rs

@@ -1478,7 +1478,9 @@ pub fn is_indirect(&self) -> bool {
     /// 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));
+        debug_assert!(
+            self.projection.is_empty() || !self.projection[1..].contains(&PlaceElem::Deref)
+        );
         self.projection.first() == Some(&PlaceElem::Deref)
     }
 

src/tools/miri

@@ -1 +1 @@
-Subproject commit dba35d2be72f4b78343d1a0f0b4737306f310672
+Subproject commit ef3f649e49607a1fad64eb0a5139110df3efa2a7