--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Tue May 22 14:54:55 2018 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Tue May 22 13:37:05 2018 +0100
@@ -1120,10 +1120,19 @@
 compiler.err.string.const.req=\
     constant string expression required
 
+# 0: symbol, 1: fragment
+compiler.err.cannot.generate.class=\
+    error while generating class {0}\n\
+    ({1})
+
 # 0: symbol, 1: symbol
-compiler.err.synthetic.name.conflict=\
+compiler.misc.synthetic.name.conflict=\
     the symbol {0} conflicts with a compiler-synthesized symbol in {1}
 
+# 0: symbol, 1: type
+compiler.misc.illegal.signature=\
+    illegal signature attribute for type {1}
+
 compiler.err.throws.not.allowed.in.intf.annotation=\
     throws clause not allowed in @interface members