From 3f4b9971fc098e05a75f0d830f2f04e1dc814668 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sun, 3 Nov 2019 09:46:33 +0100
Subject: [PATCH] newruntime: only check for dangling refs when 'owned ref T'
 support is enabled

---
 lib/core/runtime_v2.nim | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/lib/core/runtime_v2.nim b/lib/core/runtime_v2.nim
index fe4bf37bf..aa2511ce4 100644
--- a/lib/core/runtime_v2.nim
+++ b/lib/core/runtime_v2.nim
@@ -71,13 +71,14 @@ proc nimIncRef(p: pointer) {.compilerRtl, inl.} =
 
 proc nimRawDispose(p: pointer) {.compilerRtl.} =
   when not defined(nimscript):
-    when hasThreadSupport:
-      let hasDanglingRefs = atomicLoadN(addr head(p).rc, ATOMIC_RELAXED) != 0
-    else:
-      let hasDanglingRefs = head(p).rc != 0
-    if hasDanglingRefs:
-      cstderr.rawWrite "[FATAL] dangling references exist\n"
-      quit 1
+    when defined(nimOwnedEnabled):
+      when hasThreadSupport:
+        let hasDanglingRefs = atomicLoadN(addr head(p).rc, ATOMIC_RELAXED) != 0
+      else:
+        let hasDanglingRefs = head(p).rc != 0
+      if hasDanglingRefs:
+        cstderr.rawWrite "[FATAL] dangling references exist\n"
+        quit 1
     when defined(useMalloc):
       c_free(p -! sizeof(RefHeader))
     else: