Add note for RT #126143

Author: coke

S05-capture/array-alias.t

@@ -16,6 +16,8 @@ be valid perl6.
 
 plan 45;
 
+# RT #126143 - Doesn't work, file dies with compile time error.
+
 ok("  a b\tc" ~~ m/@<chars>=( \s+ \S+ )+/, 'Named simple array capture');
 is(join("|", @<chars>), "  a| b|\tc", 'Captured strings');