From 9e62876647e4b7d5c31854abf16596b76cd03b4a Mon Sep 17 00:00:00 2001
From: genotrance <dev@genotrance.com>
Date: Fri, 11 Oct 2019 00:39:18 -0500
Subject: [PATCH] Fixes #12286 - require explicit disabling of boehm interior
 pointer checking (#12406) [backport]

---
 lib/system/mmdisp.nim | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/system/mmdisp.nim b/lib/system/mmdisp.nim
index ae30dbc733..cba88104d4 100644
--- a/lib/system/mmdisp.nim
+++ b/lib/system/mmdisp.nim
@@ -152,7 +152,9 @@ when defined(boehmgc):
     proc nimGC_setStackBottom(theStackBottom: pointer) = discard
 
   proc initGC() =
-    boehmGC_set_all_interior_pointers(0)
+    when defined(boehmNoIntPtr):
+      # See #12286
+      boehmGC_set_all_interior_pointers(0)
     boehmGCinit()
     when hasThreadSupport:
       boehmGC_allow_register_threads()