commit 97418106eb7cf1f6dd660b494939af83b88beda6
Author: David Schwörer <schword2@mail.dcu.ie>
Date:   Mon Nov 25 13:18:33 2019 +0000

    Address needs to be aligned
    
    This value gets dereferenced by python, but without knowing it's true
    type. Thus a SIGBUS is thrown on some architectures, namely arm. This
    can be avoided by copying it to a larger type first, e.g. long, that
    is sufficiently aligned, and thus can be safely dereferenced by
    python.

diff --git a/tools/pylib/_boutcore_build/helper.h.in b/tools/pylib/_boutcore_build/helper.h.in
index 24c26bdf0..21f264d4c 100644
--- a/tools/pylib/_boutcore_build/helper.h.in
+++ b/tools/pylib/_boutcore_build/helper.h.in
@@ -77,8 +77,9 @@ class PythonModelCallback{
 class PythonModel: public PhysicsModel{
 protected:
   int init(bool restarting) override{
+    long aligned_restarting = restarting;
     if (_init){
-      _init->cy_execute(&restarting);
+      _init->cy_execute(&aligned_restarting);
     }
     return 0;
   };