gistfile1.txt

diff --git a/src/core/Main.pm b/src/core/Main.pm
index 811b665..ceebcfd 100644
--- a/src/core/Main.pm
+++ b/src/core/Main.pm
@@ -175,6 +175,15 @@ my sub MAIN_HELPER($retval = 0) {
     if +@matching_candidates {
         $m(|@($p), |%($n));
         return;
+        CATCH {
+            when X::AdHoc {
+                unless .backtrace[0].subname eq 'MAIN'
+                or .message.index('Constraint type check failed '
+                                ~ 'for parameter') {
+                    .rethrow;
+                }
+            }
+        }
     }
 
     # We could not find the correct MAIN to dispatch to!