diff -r 9a96f02a6293 -r 680d378b9d64 langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Tue Jan 10 11:31:59 2017 -0800
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Wed Jan 11 10:59:57 2017 +0100
@@ -823,17 +823,87 @@
 compiler.err.not.annotation.type=\
     {0} is not an annotation type
 
-# 0: symbol, 1: symbol
+# 0: symbol, 1: symbol, 2: message segment
 compiler.err.not.def.access.package.cant.access=\
-    {0} is not visible because package {1} is not visible
+    {0} is not visible\n\
+    ({2})
+
+# 0: symbol, 1: symbol, 2: message segment
+compiler.misc.not.def.access.package.cant.access=\
+    {0} is not visible\n\
+    ({2})
+
+# 0: symbol, 1: message segment
+compiler.err.package.not.visible=\
+    package {0} is not visible\n\
+    ({1})
+
+# 0: symbol, 1: message segment
+compiler.misc.package.not.visible=\
+    package {0} is not visible\n\
+    ({1})
+
+# {0} - current module
+# {1} - package in which the invisible class is declared
+# {2} - module in which {1} is declared
+# 0: symbol, 1: symbol, 2: symbol
+compiler.misc.not.def.access.does.not.read=\
+    package {1} is declared in module {2}, but module {0} does not read it
+
+# {0} - package in which the invisible class is declared
+# {1} - module in which {0} is declared
+# 0: symbol, 1: symbol
+compiler.misc.not.def.access.does.not.read.from.unnamed=\
+    package {0} is declared in module {1}, which is not in the module graph
+
+# {0} - package in which the invisible class is declared
+# {1} - current module
+# 0: symbol, 1: symbol
+compiler.misc.not.def.access.does.not.read.unnamed=\
+    package {0} is declared in the unnamed module, but module {0} does not read it
+
+# {0} - package in which the invisible class is declared
+# {1} - module in which {0} is declared
+# 0: symbol, 1: symbol
+compiler.misc.not.def.access.not.exported=\
+    package {0} is declared in module {1}, which does not export it
+
+# {0} - package in which the invisible class is declared
+# {1} - module in which {0} is declared
+# 0: symbol, 1: symbol
+compiler.misc.not.def.access.not.exported.from.unnamed=\
+    package {0} is declared in module {1}, which does not export it
+
+# {0} - package in which the invisible class is declared
+# {1} - module in which {0} is declared
+# {2} - current module
+# 0: symbol, 1: symbol, 2: symbol
+compiler.misc.not.def.access.not.exported.to.module=\
+    package {0} is declared in module {1}, which does not export it to module {2}
+
+# {0} - package in which the invisible class is declared
+# {1} - module in which {0} is declared
+# 0: symbol, 1: symbol
+compiler.misc.not.def.access.not.exported.to.module.from.unnamed=\
+    package {0} is declared in module {1}, which does not export it to the unnamed module
 
 # 0: symbol, 1: symbol
 compiler.err.not.def.access.class.intf.cant.access=\
-    {0} in {1} is defined in an inaccessible class or interface
+    {1}.{0} is defined in an inaccessible class or interface
 
 # 0: symbol, 1: symbol
 compiler.misc.not.def.access.class.intf.cant.access=\
-    {0} in {1} is defined in an inaccessible class or interface
+    {1}.{0} is defined in an inaccessible class or interface
+
+# 0: symbol, 1: symbol, 2: symbol, 3: message segment
+compiler.err.not.def.access.class.intf.cant.access.reason=\
+    {1}.{0} in package {2} is not accessible\n\
+    ({3})
+
+# 0: symbol, 1: symbol, 2: symbol, 3: message segment
+compiler.misc.not.def.access.class.intf.cant.access.reason=\
+    {1}.{0} in package {2} is not accessible\n\
+    ({3})
 
 # 0: symbol, 1: list of type, 2: type
 compiler.misc.cant.access.inner.cls.constr=\