cannot use Inf index to assign or access element in infinite array, R…

…T #73184

S02-types/array.t

@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 91;
+plan 93;
 
 #L<S02/Mutable types/Array>
 
@@ -335,6 +335,15 @@ my @array2 = ("test", 1, Mu);
     ok Array(1,2,3) eqv [1,2,3],          'Array(1,2,3) makes correct array';
 }
 
+# RT 73184
+{
+    my @a = 0..*;
+    try { @a[ Inf ] = 3 };
+    ok "$!" ~~ /'type cannot unbox to a native integer'/, 'cannot use Inf index to assign element in infinite array';
+    try { @a[ Inf ].say };
+    ok "$!" ~~ /'type cannot unbox to a native integer'/, 'cannot use Inf index to access element in infinite array';
+}
+
 done;
 
 # vim: ft=perl6