From 5f3509e140d19b989db418a00ac6778c622cde5d Mon Sep 17 00:00:00 2001
From: Florian Diebold <flodiebold@gmail.com>
Date: Sat, 19 Jan 2019 19:00:36 +0100
Subject: Add an assert

---
 crates/ra_hir/src/ty.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/ra_hir/src/ty.rs b/crates/ra_hir/src/ty.rs
index 3170ed24e..9b7182485 100644
--- a/crates/ra_hir/src/ty.rs
+++ b/crates/ra_hir/src/ty.rs
@@ -453,6 +453,7 @@ impl Ty {
         {
             substs.push(Ty::Unknown);
         }
+        assert_eq!(substs.len(), def_generics.params.len());
         Substs(substs.into())
     }
 
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