--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Mon Mar 26 21:30:33 2018 -0700
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Tue Mar 27 13:48:16 2018 -0400
@@ -2828,6 +2828,15 @@
     target-type: {2}
 
 ########################################
+# Diagnostics for lambda deduplication
+# used by LambdaToMethod (debug only)
+########################################
+
+# 0: symbol
+compiler.note.verbose.l2m.deduplicate=\
+    deduplicating lambda implementation method {0}
+
+########################################
 # Diagnostics for where clause implementation
 # used by the RichDiagnosticFormatter.
 ########################################