Doclint NPE for attribute with no value

Test case:

/** */
public class A {
    /**
     * <p id> no attr value </p>
     */
    public void foo();
}

Sample test command:
> jtreg -dir:.../tl/langtools -jdk:.../build/linux-i586/j2sdk-image -w:work -r:-report -samevm -ignore:quiet -retain:all -verbose:all test/tools/doclint/A.java
...
command: main DocLintTester A.java
reason: User specified action: run main DocLintTester A.java
elapsed time (seconds): 1.959
STDOUT:
STDERR:
java.lang.NullPointerException
at java.util.regex.Matcher.getTextLength(Matcher.java:1237)
at java.util.regex.Matcher.reset(Matcher.java:308)
at java.util.regex.Matcher.<init>(Matcher.java:228)
at java.util.regex.Pattern.matcher(Pattern.java:1096)
at com.sun.tools.doclint.Checker.visitAttribute(Checker.java:453)
at com.sun.tools.doclint.Checker.visitAttribute(Checker.java:85)
at com.sun.tools.javac.tree.DCTree$DCAttribute.accept(DCTree.java:153)
at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:76)
at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:91)
at com.sun.source.util.DocTreeScanner.visitStartElement(DocTreeScanner.java:233)
at com.sun.tools.doclint.Checker.visitStartElement(Checker.java:301)
at com.sun.tools.doclint.Checker.visitStartElement(Checker.java:85)
at com.sun.tools.javac.tree.DCTree$DCStartElement.accept(DCTree.java:684)
at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:76)
at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:91)
at com.sun.source.util.DocTreeScanner.scanAndReduce(DocTreeScanner.java:99)
at com.sun.source.util.DocTreeScanner.visitDocComment(DocTreeScanner.java:139)
at com.sun.tools.doclint.Checker.visitDocComment(Checker.java:181)
at com.sun.tools.doclint.Checker.visitDocComment(Checker.java:85)
at com.sun.tools.javac.tree.DCTree$DCDocComment.accept(DCTree.java:105)
at com.sun.source.util.DocTreeScanner.scan(DocTreeScanner.java:76)
at com.sun.tools.doclint.Checker.scan(Checker.java:147)
at com.sun.tools.doclint.DocLint$1.visitDecl(DocLint.java:150)
at com.sun.tools.doclint.DocLint$DeclScanner.visitMethod(DocLint.java:362)
at com.sun.tools.doclint.DocLint$DeclScanner.visitMethod(DocLint.java:351)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:744)
at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:132)
at com.sun.tools.doclint.DocLint$DeclScanner.visitClass(DocLint.java:357)
at com.sun.tools.doclint.DocLint$DeclScanner.visitClass(DocLint.java:351)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:671)
at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:119)
at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:545)
at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
at com.sun.tools.doclint.DocLint.run(DocLint.java:154)
at DocLintTester.check(DocLintTester.java:79)
at DocLintTester.run(DocLintTester.java:65)
at DocLintTester.main(DocLintTester.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:477)
at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:706)
at java.lang.Thread.run(Thread.java:722)

JavaTest Message: Test threw exception: java.lang.NullPointerException
JavaTest Message: shutting down test