From 19f36bc2f3ceede89f20dd1e20301eac50d9f68c Mon Sep 17 00:00:00 2001
From: Ryan1729 <Ryan1729@gmail.com>
Date: Tue, 4 Aug 2020 16:45:47 -0600
Subject: [PATCH] add description to assert

---
 clippy_lints/src/transmute.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/clippy_lints/src/transmute.rs b/clippy_lints/src/transmute.rs
index b6747c73f70..ea14f2829ea 100644
--- a/clippy_lints/src/transmute.rs
+++ b/clippy_lints/src/transmute.rs
@@ -723,7 +723,10 @@ fn check_cast<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, from_ty: Ty<'tcx>
         );
 
         // If we already have errors, we can't be sure we can pointer cast.
-        assert!(!fn_ctxt.errors_reported_since_creation());
+        assert!(
+            !fn_ctxt.errors_reported_since_creation(), 
+            "Newly created FnCtxt contained errors"
+        );
 
         if let Ok(check) = CastCheck::new(
             &fn_ctxt,