Prepare for 12.2 release (#287)

Author: AndyGauge

CHANGELOG.md

@@ -1,4 +1,7 @@
-# Unreleased
+# 0.12.2
+- [allow `Error::description` to be used for rust below 1.42](https://github.com/rust-lang-nursery/error-chain/pull/285)
+- [Improvements to has_backtrace_depending_on_env](https://github.com/rust-lang-nursery/error-chain/pull/277)
+- Backtrace support now requires rust 1.32.0
 
 # 0.12.1
 

Cargo.toml

@@ -1,10 +1,11 @@
 [package]
 name = "error-chain"
-version = "0.12.1" # remember to update html_root_url
+version = "0.12.2" # remember to update html_root_url
 authors = [ "Brian Anderson <banderson@mozilla.com>",
             "Paul Colomiets <paul@colomiets.name>",
             "Colin Kiegel <kiegel@gmx.de>",
-            "Yamakaky <yamakaky@yamaworld.fr>"]
+            "Yamakaky <yamakaky@yamaworld.fr>",
+            "Andrew Gauger <andygauge@gmail.com>"]
 description = "Yet another error boilerplate library."
 keywords = ["error"]
 categories = ["rust-patterns"]

src/error_chain.rs

@@ -73,14 +73,18 @@ macro_rules! impl_error_chain_cause_or_source {
 #[cfg(has_error_description_deprecated)]
 #[macro_export(local_inner_macros)]
 macro_rules! call_to_deprecated_description {
-    ($e:ident) => { "" };
+    ($e:ident) => {
+        ""
+    };
 }
 
 #[doc(hidden)]
 #[cfg(not(has_error_description_deprecated))]
 #[macro_export(local_inner_macros)]
 macro_rules! call_to_deprecated_description {
-    ($e:ident) => { ::std::error::Error::description($e) };
+    ($e:ident) => {
+        ::std::error::Error::description($e)
+    };
 }
 
 /// Prefer to use `error_chain` instead of this macro.

src/lib.rs

@@ -1,5 +1,5 @@
 #![deny(missing_docs)]
-#![doc(html_root_url = "https://docs.rs/error-chain/0.12.1")]
+#![doc(html_root_url = "https://docs.rs/error-chain/0.12.2")]
 
 //! A library for consistent and reliable error handling
 //!