I tried to test Nongreedy Subrules under ANTLR v2.7.1, onto a C-style comment. The compilation was successful, but I kept receiving runtime error. Can someone give me a hint?
			

		

Here is the runtime error message:

			

			Exception: antlr.TokenStreamRecognitionException: expecting '*', found ' '
			

		

Input test data:

			

			/* BA */
			

		

Most importantly, the grammar code(.g):

header {
import java.io.*;
import java.util.*;
}

class P extends Parser;

startRule
:
n:COMMENT_BLOCK
;

class L extends Lexer;
options {
k=2;
}

COMMENT_BLOCK
: "/*"
(
options {
greedy=false;
}
: .
)*
"*/"
{ System.out.println($getText); }
;


Thanks for the help in advance!