From 7d41cbad6a34976e3d6d0321ba1d4c433e24e21c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Esteban=20K=C3=BCber?= <esteban@kuber.com.ar>
Date: Mon, 22 Jan 2018 18:05:49 -0800
Subject: [PATCH] Don't make it necessary to enable `unstable-options`

---
 src/librustc/session/config.rs | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 4d54f2a3677..759e32abd60 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1625,10 +1625,6 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
         early_error(ErrorOutputType::Json(false), "--error-format=pretty-json is unstable");
     }
 
-    if !debugging_opts.unstable_options && debugging_opts.explain {
-        early_error(error_format, "-Z --explain is unstable");
-    }
-
     let mut output_types = BTreeMap::new();
     if !debugging_opts.parse_only {
         for list in matches.opt_strs("emit") {