From afeda72dad761325ea759fd2008730e24a165b9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20K=C3=A5re=20Alsaker?= <john.kare.alsaker@gmail.com>
Date: Tue, 9 Apr 2019 09:18:49 +0200
Subject: [PATCH] Ensure the symbols are pure strings

---
 src/libsyntax/ast.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index c015e9b06acd..0668730b3ef0 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -70,7 +70,13 @@ pub struct Path {
 
 impl PartialEq<Symbol> for Path {
     fn eq(&self, symbol: &Symbol) -> bool {
-        self.segments.len() == 1 && self.segments[0].ident.name.interned() == *symbol
+        self.segments.len() == 1 && {
+            let name = self.segments[0].ident.name;
+            // Make sure these symbols are pure strings
+            debug_assert!(!symbol.is_gensymed());
+            debug_assert!(!name.is_gensymed());
+            name == *symbol
+        }
     }
 }