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@@ Line 1,827: / Line 1,827: @@
         "Select entry #: ",
         f(.x) {
-            if not matching(RE/^[0-9]+$/, .x): return false
+            if not(.x -> RE/^[0-9]+$/): return false
             val .y = number .x
             .y > 0 and .y <= len(.entries)