From 0e7eef6556703cd53b336d0b5280c3696586d431 Mon Sep 17 00:00:00 2001
From: Philip Herron <philip.herron@embecosm.com>
Date: Wed, 30 Mar 2022 14:56:34 +0100
Subject: [PATCH] Make the can equal interface more permissive with associated
 types

---
 gcc/rust/typecheck/rust-tyty-cmp.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/gcc/rust/typecheck/rust-tyty-cmp.h b/gcc/rust/typecheck/rust-tyty-cmp.h
index 34c89639f6f..9ea49cae820 100644
--- a/gcc/rust/typecheck/rust-tyty-cmp.h
+++ b/gcc/rust/typecheck/rust-tyty-cmp.h
@@ -43,16 +43,19 @@ public:
 	    return ok;
 	  }
       }
-    else if (other->get_kind () == TypeKind::PLACEHOLDER)
+    if (other->get_kind () == TypeKind::PLACEHOLDER)
       {
 	const PlaceholderType *p = static_cast<const PlaceholderType *> (other);
 	if (p->can_resolve ())
 	  {
-	    const BaseType *resolved = p->resolve ();
-	    resolved->accept_vis (*this);
-	    return ok;
+	    other = p->resolve ();
 	  }
       }
+    if (other->get_kind () == TypeKind::PROJECTION)
+      {
+	const ProjectionType *p = static_cast<const ProjectionType *> (other);
+	other = p->get ();
+      }
 
     other->accept_vis (*this);
     return ok;