From a4982bd74de050a46a3154d32be617dc60a2407f Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Thu, 22 Jan 2026 16:50:25 +0800
Subject: [PATCH] fixes #25446; [FieldDefect] with static: discard
 cast[pointer](default(pointer)) (#25448)

fixes #25446

supports this since `static: discard cast[pointer](nil)` works

(cherry picked from commit 39864980d1ee60f1c33a26fe5b5104eb16e0d475)
---
 compiler/vm.nim      | 5 ++++-
 tests/vm/tvmmisc.nim | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/compiler/vm.nim b/compiler/vm.nim
index 8b462c4d99..57132f1ad5 100644
--- a/compiler/vm.nim
+++ b/compiler/vm.nim
@@ -663,7 +663,10 @@ proc rawExecute(c: PCtx, start: int, tos: PStackFrame): TFullReg =
       of rkNode:
         if regs[rb].node.typ.kind notin PtrLikeKinds:
           stackTrace(c, tos, pc, "opcCastIntToPtr: regs[rb].node.typ: " & $regs[rb].node.typ.kind)
-        node2.intVal = regs[rb].node.intVal
+        if regs[rb].node.kind == nkNilLit:
+          node2.intVal = 0
+        else:
+          node2.intVal = regs[rb].node.intVal
       else: stackTrace(c, tos, pc, "opcCastIntToPtr: regs[rb].kind: " & $regs[rb].kind)
       regs[ra].node = node2
     of opcAsgnComplex:
diff --git a/tests/vm/tvmmisc.nim b/tests/vm/tvmmisc.nim
index 610dd26691..e2d979fad6 100644
--- a/tests/vm/tvmmisc.nim
+++ b/tests/vm/tvmmisc.nim
@@ -814,6 +814,8 @@ static:
   conf.val = 2
   foo2323(defaultConf)
 
+  discard cast[pointer](default(pointer)) # bug #25446
+
 
 proc g1314(_: static bool) = discard
 proc g1314(_: int) = discard