From eaa6488ca7550428ce70d6f43e906a8e36def943 Mon Sep 17 00:00:00 2001
From: Jubilee <46493976+workingjubilee@users.noreply.github.com>
Date: Mon, 23 Mar 2020 22:54:06 -0700
Subject: [PATCH] Request "-Z unstable-options" for unstable options

Explicitly requests the "-Z unstable-options" flag if someone attempts to use
a cargo option gated by it. This enhances discoverability, particularly in the
instance where the user is on the nightly compiler but isn't using the flag.
---
 src/libtest/cli.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libtest/cli.rs b/src/libtest/cli.rs
index 5317063b80d..aac454c023c 100644
--- a/src/libtest/cli.rs
+++ b/src/libtest/cli.rs
@@ -213,7 +213,7 @@ macro_rules! unstable_optflag {
         let opt = $matches.opt_present($option_name);
         if !$allow_unstable && opt {
             return Err(format!(
-                "The \"{}\" flag is only accepted on the nightly compiler",
+                "The \"{}\" flag is only accepted on the nightly compiler with -Z unstable-options",
                 $option_name
             ));
         }