From 3e98c3acf5c598ae577428fa8fbf1c29e270739b Mon Sep 17 00:00:00 2001
From: Aaron Hill <aa1ronham@gmail.com>
Date: Sun, 28 Jul 2019 19:12:04 -0400
Subject: [PATCH] Rename test and add comment

---
 .../{issue-52843.rs => issue-52843-closure-constrain.rs}      | 1 +
 ...ssue-52843.stderr => issue-52843-closure-constrain.stderr} | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)
 rename src/test/ui/existential-type/{issue-52843.rs => issue-52843-closure-constrain.rs} (77%)
 rename src/test/ui/existential-type/{issue-52843.stderr => issue-52843-closure-constrain.stderr} (84%)

diff --git a/src/test/ui/existential-type/issue-52843.rs b/src/test/ui/existential-type/issue-52843-closure-constrain.rs
similarity index 77%
rename from src/test/ui/existential-type/issue-52843.rs
rename to src/test/ui/existential-type/issue-52843-closure-constrain.rs
index c625909e47831..b2bbc1f154998 100644
--- a/src/test/ui/existential-type/issue-52843.rs
+++ b/src/test/ui/existential-type/issue-52843-closure-constrain.rs
@@ -1,3 +1,4 @@
+// Checks to ensure that we properly detect when a closure constrains an existential type
 #![feature(existential_type)]
 
 use std::fmt::Debug;
diff --git a/src/test/ui/existential-type/issue-52843.stderr b/src/test/ui/existential-type/issue-52843-closure-constrain.stderr
similarity index 84%
rename from src/test/ui/existential-type/issue-52843.stderr
rename to src/test/ui/existential-type/issue-52843-closure-constrain.stderr
index 337e84bb8f50a..424d65a193c92 100644
--- a/src/test/ui/existential-type/issue-52843.stderr
+++ b/src/test/ui/existential-type/issue-52843-closure-constrain.stderr
@@ -1,11 +1,11 @@
 error: concrete type differs from previous defining existential type use
-  --> $DIR/issue-52843.rs:7:5
+  --> $DIR/issue-52843-closure-constrain.rs:8:5
    |
 LL |     fn _unused() -> Existential { String::new() }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, got `std::string::String`
    |
 note: previous use here
-  --> $DIR/issue-52843.rs:5:1
+  --> $DIR/issue-52843-closure-constrain.rs:6:1
    |
 LL | / fn main() {
 LL | |     existential type Existential: Debug;