Merge branch 'master' into master

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+Your issue may already be reported!
+Please search on the [Actix Web issue tracker](https://github.com/actix/actix-web/issues) before creating one.
+
+## Expected Behavior
+<!--- If you're describing a bug, tell us what should happen -->
+<!--- If you're suggesting a change/improvement, tell us how it should work -->
+
+## Current Behavior
+<!--- If describing a bug, tell us what happens instead of the expected behavior -->
+<!--- If suggesting a change/improvement, explain the difference from current behavior -->
+
+## Possible Solution
+<!--- Not obligatory, but suggest a fix/reason for the bug, -->
+<!--- or ideas how to implement the addition or change -->
+
+## Steps to Reproduce (for bugs)
+<!--- Provide a link to a live example, or an unambiguous set of steps to -->
+<!--- reproduce this bug. Include code to reproduce, if relevant -->
+1.
+2.
+3.
+4.
+
+## Context
+<!--- How has this issue affected you? What are you trying to accomplish? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
+
+## Your Environment
+<!--- Include as many relevant details about the environment you experienced the bug in -->
+
+* Rust Version (I.e, output of `rustc -V`):
+* Actix Web Version: 

actix-http/src/cloneable.rs

@@ -1,4 +1,4 @@
-use std::cell::UnsafeCell;
+use std::cell::RefCell;
 use std::rc::Rc;
 use std::task::{Context, Poll};
 
@@ -6,11 +6,15 @@ use actix_service::Service;
 
 #[doc(hidden)]
 /// Service that allows to turn non-clone service to a service with `Clone` impl
-pub(crate) struct CloneableService<T: Service>(Rc<UnsafeCell<T>>);
+/// 
+/// # Panics
+/// CloneableService might panic with some creative use of thread local storage.
+/// See https://github.com/actix/actix-web/issues/1295 for example
+pub(crate) struct CloneableService<T: Service>(Rc<RefCell<T>>);
 
 impl<T: Service> CloneableService<T> {
     pub(crate) fn new(service: T) -> Self {
-        Self(Rc::new(UnsafeCell::new(service)))
+        Self(Rc::new(RefCell::new(service)))
     }
 }
 
@@ -27,10 +31,10 @@ impl<T: Service> Service for CloneableService<T> {
     type Future = T::Future;
 
     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        unsafe { &mut *self.0.as_ref().get() }.poll_ready(cx)
+        self.0.borrow_mut().poll_ready(cx)
     }
 
     fn call(&mut self, req: T::Request) -> Self::Future {
-        unsafe { &mut *self.0.as_ref().get() }.call(req)
+        self.0.borrow_mut().call(req)
     }
 }