From c30948e57d689d729dd920a3b1b63f1e71fea20f Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Sat, 21 Feb 2026 23:17:22 +0100
Subject: [PATCH] progress

---
 lib/system.nim | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/system.nim b/lib/system.nim
index 19f5b12804..b53bd58526 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -1459,6 +1459,7 @@ proc isNil*[T: proc | iterator {.closure.}](x: T): bool {.noSideEffect, magic: "
   ## `== nil`.
 
 proc supportsCopyMem(t: typedesc): bool {.magic: "TypeTrait".}
+proc canFormCycles(t: typedesc): bool {.magic: "TypeTrait".}
 
 when defined(nimHasTopDownInference):
   # magic used for seq type inference