diff -r fdba8b9800fa usr/src/lib/libdtrace/common/dt_lex.l
--- a/usr/src/lib/libdtrace/common/dt_lex.l	Mon Mar 16 21:18:21 2009 -0700
+++ b/usr/src/lib/libdtrace/common/dt_lex.l	Mon Mar 29 00:03:54 2010 +0900
@@ -776,9 +776,6 @@
 			ttok = DT_TOK_IDENT;
 		unput(c1);
 		break;
-	case '[':
-		ttok = DT_TOK_IDENT;
-		break;
 	}
 
 	if (ttok == DT_TOK_IDENT) {