add unit test simplifying the failing case

easyjson is mistakenly naming the type of this field 'tests.MyString' in the generated output
something about a named type inside an anonmymous type is triggering this bug.

Makefile

@@ -21,7 +21,8 @@ generate: root build
 		.root/src/$(PKG)/tests/snake.go \
 		.root/src/$(PKG)/tests/data.go \
 		.root/src/$(PKG)/tests/omitempty.go \
-		.root/src/$(PKG)/tests/nothing.go
+		.root/src/$(PKG)/tests/nothing.go \
+		.root/src/$(PKG)/tests/named_type.go
 
 	.root/bin/easyjson -all .root/src/$(PKG)/tests/data.go 
 	.root/bin/easyjson -all .root/src/$(PKG)/tests/nothing.go
@@ -29,6 +30,7 @@ generate: root build
 	.root/bin/easyjson -omit_empty .root/src/$(PKG)/tests/omitempty.go
 	.root/bin/easyjson -build_tags=use_easyjson .root/src/$(PKG)/benchmark/data.go
 	.root/bin/easyjson .root/src/$(PKG)/tests/nested_easy.go
+	.root/bin/easyjson .root/src/$(PKG)/tests/named_type.go
 
 test: generate root
 	go test \

tests/named_type.go

@@ -0,0 +1,15 @@
+package tests
+
+//easyjson:json
+type NamedType struct {
+	Inner struct {
+		// easyjson is mistakenly naming the type of this field 'tests.MyString' in the generated output
+		// something about a named type inside an anonmymous type is triggering this bug
+		Field MyString
+	}
+}
+
+type MyString string
+
+var namedTypeValue = NamedType{Inner: struct{ Field MyString }{Field: "test"}}
+var namedTypeValueString = `{"Inner":{"Field":"test"}}`