Add tests for RT #115280

Author: coke

S12-class/attributes.t

@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 22;
+plan 24;
 
 # L<S12/Fancy method calls/"For a call on your own private method">
 
@@ -124,4 +124,12 @@ eval_dies_ok q[
     isa_ok B.new.foo, A, 'class attribute can be initialized using .=';
 }
 
+#RT #115280
+{
+    eval_lives_ok '(class A { has $.x }).new.x.HOW',
+        "HOW on attributes lives, custom class";
+    eval_lives_ok '(1/2).numerator.HOW',
+        "HOW on attributes lives, builtin";
+}
+
 # vim: ft=perl6