8371248: Crash in -Xdoclint with invalid @link

Reviewed-by: hannesw, vromero

Author: lahodaj

src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacTrees.java

@@ -473,6 +473,10 @@ private Symbol attributeDocReference(TreePath path, DCReference ref) {
             if (memberName == null)
                 return tsym;
 
+            if (tsym.type.isPrimitive()) {
+                return null;
+            }
+
             final List<Type> paramTypes;
             if (ref.paramTypes == null)
                 paramTypes = null;

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -377,7 +377,7 @@ private class IdentAttributer extends SimpleTreeVisitor<Symbol,Env<AttrContext>>
             @Override @DefinedBy(Api.COMPILER_TREE)
             public Symbol visitMemberSelect(MemberSelectTree node, Env<AttrContext> env) {
                 Symbol site = visit(node.getExpression(), env);
-                if (site.kind == ERR || site.kind == ABSENT_TYP || site.kind == HIDDEN)
+                if (site == null || site.kind == ERR || site.kind == ABSENT_TYP || site.kind == HIDDEN)
                     return site;
                 Name name = (Name)node.getIdentifier();
                 if (site.kind == PCK) {

test/langtools/tools/javac/doctree/ReferenceTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 7021614 8278373 8164094
+ * @bug 7021614 8278373 8164094 8371248
  * @summary extend com.sun.source API to support parsing javadoc comments
  * @summary check references in at-see and {at-link} tags
  * @modules jdk.compiler
@@ -43,6 +43,7 @@
 import com.sun.source.util.TreePath;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 import javax.annotation.processing.AbstractProcessor;
@@ -83,6 +84,31 @@
  * {@link #trees Field}
  * {@link #getSupportedSourceVersion Method}
  * {@link #init(ProcessingEnvironment Method}
+ * {@link double Class}
+ * {@link double.NAN Bad}
+ * {@link double#NAN Bad}
+ * {@link double#double Bad}
+ * {@link java.base/double Bad}
+ *
+ * {@link List<String> Interface}
+ * {@link List<String>.add Bad}
+ * {@link List<String>#add Method}
+ * {@link List<String>#add(Object) Method}
+ * {@link Map<String, String>.Entry Interface}
+ * {@link Map<String, String>.Entry<String, String> Interface}
+ * {@link Map<String, String>.Entry<String, String>.getKey Bad}
+ * {@link Map<String, String>.Entry<String, String>#getKey Method}
+ * {@link Map<String, String>.Entry<String, String>#setValue(Object) Method}
+ *
+ * {@link java.base/java.util.List<String> Bad}
+ * {@link java.base/java.util.List<String>.add Bad}
+ * {@link java.base/java.util.List<String>#add Bad}
+ * {@link java.base/java.util.List<String>#add(Object) Bad}
+ * {@link java.base/java.util.Map<String, String>.Entry Bad}
+ * {@link java.base/java.util.Map<String, String>.Entry<String, String> Bad}
+ * {@link java.base/java.util.Map<String, String>.Entry<String, String>.getKey Bad}
+ * {@link java.base/java.util.Map<String, String>.Entry<String, String>#getKey Bad}
+ * {@link java.base/java.util.Map<String, String>.Entry<String, String>#setValue(Object) Bad}
  *
  * @see java.lang        Package
  * @see java.lang.ERROR  Bad