From 7bb7adf89c912ea4a80d8fde0026d6f838a6ac0a Mon Sep 17 00:00:00 2001
From: Nikolay Kim <fafhrd91@gmail.com>
Date: Sat, 20 Jan 2018 22:02:42 -0800
Subject: [PATCH] relax InternalError constraints

---
 guide/src/qs_4_5.md |  3 +--
 src/error.rs        | 12 ++++++------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/guide/src/qs_4_5.md b/guide/src/qs_4_5.md
index 18bf7ed6..5a11af73 100644
--- a/guide/src/qs_4_5.md
+++ b/guide/src/qs_4_5.md
@@ -116,8 +116,7 @@ specific error response. We can use helper types for first example with custom e
 #[macro_use] extern crate failure;
 use actix_web::*;
 
-#[derive(Fail, Debug)]
-#[fail(display="Error {}", name)]
+#[derive(Debug)]
 struct MyError {
    name: &'static str
 }
diff --git a/src/error.rs b/src/error.rs
index 7d821307..08424921 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -531,7 +531,7 @@ impl<T> InternalError<T> {
 }
 
 impl<T> Fail for InternalError<T>
-    where T: Send + Sync + fmt::Display + fmt::Debug + 'static
+    where T: Send + Sync + fmt::Debug + 'static
 {
     fn backtrace(&self) -> Option<&Backtrace> {
         Some(&self.backtrace)
@@ -539,7 +539,7 @@ impl<T> Fail for InternalError<T>
 }
 
 impl<T> fmt::Debug for InternalError<T>
-    where T: Send + Sync + fmt::Display + fmt::Debug + 'static
+    where T: Send + Sync + fmt::Debug + 'static
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         fmt::Debug::fmt(&self.cause, f)
@@ -547,15 +547,15 @@ impl<T> fmt::Debug for InternalError<T>
 }
 
 impl<T> fmt::Display for InternalError<T>
-    where T: Send + Sync + fmt::Display + fmt::Debug + 'static
+    where T: Send + Sync + fmt::Debug + 'static
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.cause, f)
+        fmt::Debug::fmt(&self.cause, f)
     }
 }
 
 impl<T> ResponseError for InternalError<T>
-    where T: Send + Sync + fmt::Display + fmt::Debug + 'static
+    where T: Send + Sync + fmt::Debug + 'static
 {
     fn error_response(&self) -> HttpResponse {
         HttpResponse::new(self.status, Body::Empty)
@@ -563,7 +563,7 @@ impl<T> ResponseError for InternalError<T>
 }
 
 impl<T> Responder for InternalError<T>
-    where T: Send + Sync + fmt::Display + fmt::Debug + 'static
+    where T: Send + Sync + fmt::Debug + 'static
 {
     type Item = HttpResponse;
     type Error = Error;