--- a/langtools/src/jdk.compiler/share/classes/jdk/internal/shellsupport/doc/JavadocFormatter.java	Wed Jul 05 22:27:20 2017 +0200
+++ b/langtools/src/jdk.compiler/share/classes/jdk/internal/shellsupport/doc/JavadocFormatter.java	Wed Nov 16 17:48:43 2016 +0100
@@ -246,7 +246,7 @@
 
         @Override @DefinedBy(Api.COMPILER_TREE)
         public Object visitStartElement(StartElementTree node, Object p) {
-            switch (HtmlTag.get(node.getName())) {
+            switch (getHtmlTag(node.getName())) {
                 case P:
                     if (lastNode!= null && lastNode.getKind() == DocTree.Kind.START_ELEMENT &&
                         HtmlTag.get(((StartElementTree) lastNode).getName()) == HtmlTag.LI) {
@@ -397,7 +397,7 @@
         }
 
         private void handleEndElement(Name name) {
-            switch (HtmlTag.get(name)) {
+            switch (getHtmlTag(name)) {
                 case BLOCKQUOTE:
                     indent -= INDENT;
                     break;
@@ -629,6 +629,12 @@
         }
     }
 
+    private static HtmlTag getHtmlTag(Name name) {
+        HtmlTag tag = HtmlTag.get(name);
+
+        return tag != null ? tag : HtmlTag.HTML; //using HtmlTag.HTML as default no-op value
+    }
+
     private static Map<StartElementTree, Integer> countTableColumns(DocCommentTree dct) {
         Map<StartElementTree, Integer> result = new IdentityHashMap<>();
 
@@ -639,7 +645,7 @@
 
             @Override @DefinedBy(Api.COMPILER_TREE)
             public Void visitStartElement(StartElementTree node, Void p) {
-                switch (HtmlTag.get(node.getName())) {
+                switch (getHtmlTag(node.getName())) {
                     case TABLE: currentTable = node; break;
                     case TR:
                         currentMaxColumns = Math.max(currentMaxColumns, currentRowColumns);

--- a/langtools/src/jdk.jshell/share/classes/jdk/internal/jshell/tool/ConsoleIOContext.java	Wed Jul 05 22:27:20 2017 +0200
+++ b/langtools/src/jdk.jshell/share/classes/jdk/internal/jshell/tool/ConsoleIOContext.java	Wed Nov 16 17:48:43 2016 +0100
@@ -283,9 +283,9 @@
             if (firstInvocation) {
                 convertor = d -> d.signature();
             } else {
-                convertor = d -> formatter.formatJavadoc(d.signature(),
-                                                         d.javadoc() != null ? d.javadoc()
-                                                                             : repl.messageFormat("jshell.console.no.javadoc"));
+                convertor = d -> formatter.formatJavadoc(d.signature(), d.javadoc()) +
+                                 (d.javadoc() == null ? repl.messageFormat("jshell.console.no.javadoc")
+                                                      : "");
             }
             doc = repl.analysis.documentation(prefix + buffer, cursor + prefix.length(), !firstInvocation)
                                .stream()

--- a/langtools/src/jdk.jshell/share/classes/jdk/jshell/SourceCodeAnalysisImpl.java	Wed Jul 05 22:27:20 2017 +0200
+++ b/langtools/src/jdk.jshell/share/classes/jdk/jshell/SourceCodeAnalysisImpl.java	Wed Nov 16 17:48:43 2016 +0100
@@ -1341,9 +1341,9 @@
                                 .collect(joining(" & "));
             }
             case FIELD:
-                return elementHeader(at, el.getEnclosingElement(), includeParameterNames, false) + "." + el.getSimpleName() + ":" + el.asType();
+                return appendDot(elementHeader(at, el.getEnclosingElement(), includeParameterNames, false)) + el.getSimpleName() + ":" + el.asType();
             case ENUM_CONSTANT:
-                return elementHeader(at, el.getEnclosingElement(), includeParameterNames, false) + "." + el.getSimpleName();
+                return appendDot(elementHeader(at, el.getEnclosingElement(), includeParameterNames, false)) + el.getSimpleName();
             case EXCEPTION_PARAMETER: case LOCAL_VARIABLE: case PARAMETER: case RESOURCE_VARIABLE:
                 return el.getSimpleName() + ":" + el.asType();
             case CONSTRUCTOR: case METHOD: {
@@ -1407,6 +1407,9 @@
                 return el.toString();
         }
     }
+    private String appendDot(String fqn) {
+        return fqn.isEmpty() ? fqn : fqn + ".";
+    }
     private TypeMirror unwrapArrayType(TypeMirror arrayType) {
         if (arrayType.getKind() == TypeKind.ARRAY) {
             return ((ArrayType)arrayType).getComponentType();

--- a/langtools/test/jdk/internal/shellsupport/doc/JavadocFormatterTest.java	Wed Jul 05 22:27:20 2017 +0200
+++ b/langtools/test/jdk/internal/shellsupport/doc/JavadocFormatterTest.java	Wed Nov 16 17:48:43 2016 +0100
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8131019
+ * @bug 8131019 8169561
  * @summary Test JavadocFormatter
  * @library /tools/lib
  * @modules jdk.compiler/jdk.internal.shellsupport.doc
@@ -388,6 +388,17 @@
         if (!Objects.equals(actual, expected)) {
             throw new AssertionError("Incorrect output: " + actual);
         }
+
+        //unknown HTML tag:
+        actual = new JavadocFormatter(66, false).formatJavadoc("test",
+                "1234 <unknown any any>1234</unknown> 1234");
+
+        expected = "test\n" +
+                   "1234 1234 1234\n";
+
+        if (!Objects.equals(actual, expected)) {
+            throw new AssertionError("Incorrect output: " + actual);
+        }
     }
 
 }

--- a/langtools/test/jdk/jshell/JavadocTest.java	Wed Jul 05 22:27:20 2017 +0200
+++ b/langtools/test/jdk/jshell/JavadocTest.java	Wed Nov 16 17:48:43 2016 +0100
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8131019
+ * @bug 8131019 8169561
  * @summary Test Javadoc
  * @library /tools/lib
  * @modules jdk.compiler/com.sun.tools.javac.api
@@ -65,6 +65,11 @@
         assertJavadoc("clz.undef|");
     }
 
+    public void testVariableInRepl() {
+        assertEval("Object o;");
+        assertSignature("o|", "o:java.lang.Object");
+    }
+
     private void prepareZip() {
         String clazz =
                 "package test;\n" +