From a0026a09d76c09266c368c7a07a0cc2c5994367e Mon Sep 17 00:00:00 2001
From: Felix Mulder <felix.mulder@gmail.com>
Date: Thu, 29 Sep 2016 15:27:18 +0200
Subject: Make reporter hint about existing explanations

---
 src/dotty/tools/dotc/reporting/ConsoleReporter.scala | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/dotty/tools/dotc/reporting/ConsoleReporter.scala b/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
index 8ded4035c..45933d954 100644
--- a/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
+++ b/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
@@ -120,7 +120,10 @@ class ConsoleReporter(
         printMessageAndPos(m.contained, m.pos, "Info")
     }
 
-    if (ctx.shouldExplain(m)) printExplanation(m.contained)
+    if (ctx.shouldExplain(m))
+      printExplanation(m.contained)
+    else if (m.contained.explanation.nonEmpty)
+      printMessage("\nlonger explanation available when compiling with `-explain`")
   }
 
   def displayPrompt(): Unit = {
-- 
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