Absent named parameters in quasipatterns are treated as implicit discards

packages/core/src/runtime/quasivalue.ts

@@ -138,7 +138,7 @@ export function ctor(info: QuasiValueConstructorInfo, ... items: QuasiValue[]):
                     return p;
                 }
             }
-            throw new Error(`Missing named parameter ${stringify(b.name.description!)} to ${defNameStr}`);
+            return _;
         }
 
         function qPattern(p: Meta.Pattern<unknown>): QuasiValue {