Add test for RT #72082

Author: coke

S06-signature/errors.t

@@ -2,7 +2,7 @@
 
 use Test;
 
-plan 9;
+plan 10;
 
 =begin pod
 
@@ -46,4 +46,11 @@ eval_lives_ok 'sub quuuux ($!) { ... }', 'but $! is OK';
 eval_dies_ok 'my class A { submethod BUILD(:$!notthere = 10) }; A.new',
     'named parameter of undeclared attribute dies';
 
+# RT #72082
+{
+    try { eval 'sub rt72082(@a, $b) {}; rt72082(5)' };
+    my $error = ~$!;
+    ok $error ~~ / 'will never work' .* 'Expected' .* '(@a, $b)' /
+}
+
 # vim: ft=perl6