/***/ in Java file causes ParseException in version 1.6.3

We get ParseException as follows when we try to parse a java file that contains /***/ as comment or javadoc for any method.

com.thoughtworks.qdox.parser.ParseException: syntax error @[10,1] in UNKNOWN SOURCE
at com.thoughtworks.qdox.parser.impl.Parser.yyerror(Parser.java:716)
at com.thoughtworks.qdox.parser.impl.Parser.yyparse(Parser.java:826)
at com.thoughtworks.qdox.parser.impl.Parser.parse(Parser.java:697)
at com.thoughtworks.qdox.JavaDocBuilder.addSource(JavaDocBuilder.java:300)
at com.thoughtworks.qdox.JavaDocBuilder.addSource(JavaDocBuilder.java:290)

Question: When java compiler ignores it and compiles it, why should that be not ignored?