Fix test failures

src/compiler/binder.ts

@@ -1379,6 +1379,7 @@ namespace ts {
         }
 
         function bindJSDocTypeAlias(node: JSDocTypedefTag | JSDocCallbackTag) {
+            node.tagName.parent = node;
             if (node.fullName) {
                 setParentPointers(node, node.fullName);
             }

src/compiler/utilities.ts

@@ -6772,7 +6772,7 @@ namespace ts {
 
     // TODO: determine what this does before making it public.
     /* @internal */
-    export function isJSDocTag(node: Node): boolean {
+    export function isJSDocTag(node: Node): node is JSDocTag {
         return node.kind >= SyntaxKind.FirstJSDocTagNode && node.kind <= SyntaxKind.LastJSDocTagNode;
     }
 

src/services/codefixes/fixUnusedIdentifier.ts

@@ -84,8 +84,8 @@ namespace ts.codefix {
                         if (importDecl) {
                             changes.delete(sourceFile, importDecl);
                         }
-                        else if (token.kind === SyntaxKind.AtToken && isJSDocTemplateTag(token.parent)) {
-                            changes.delete(sourceFile, token.parent);
+                        else if (isJSDocTemplateTag(token)) {
+                            changes.delete(sourceFile, token);
                         }
                         else if (token.kind === SyntaxKind.LessThanToken) {
                             deleteTypeParameters(changes, sourceFile, token);

src/services/services.ts

@@ -1481,7 +1481,7 @@ namespace ts {
         function shouldGetType(sourceFile: SourceFile, node: Node, position: number): boolean {
             switch (node.kind) {
                 case SyntaxKind.Identifier:
-                    return !isLabelName(node);
+                    return !isLabelName(node) && !isTagName(node);
                 case SyntaxKind.PropertyAccessExpression:
                 case SyntaxKind.QualifiedName:
                     // Don't return quickInfo if inside the comment in `a/**/.b`
@@ -2159,7 +2159,7 @@ namespace ts {
     function initializeNameTable(sourceFile: SourceFile): void {
         const nameTable = sourceFile.nameTable = createUnderscoreEscapedMap<number>();
         sourceFile.forEachChild(function walk(node) {
-            if (isIdentifier(node) && node.escapedText || isStringOrNumericLiteralLike(node) && literalIsName(node)) {
+            if (isIdentifier(node) && !isTagName(node) && node.escapedText || isStringOrNumericLiteralLike(node) && literalIsName(node)) {
                 const text = getEscapedTextOfIdentifierOrLiteral(node);
                 nameTable.set(text, nameTable.get(text) === undefined ? node.pos : -1);
             }

src/services/utilities.ts

@@ -246,6 +246,10 @@ namespace ts {
         return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
     }
 
+    export function isTagName(node: Node): boolean {
+        return isJSDocTag(node.parent) && node.parent.tagName === node;
+    }
+
     export function isRightSideOfQualifiedName(node: Node) {
         return node.parent.kind === SyntaxKind.QualifiedName && (<QualifiedName>node.parent).right === node;
     }