Hi Luiz, > Perhaps this is the same problem reported in this thread: > http://lua-users.org/lists/lua-l/2013-05/msg00047.html Most likely; I vaguely remember seeing the discussion, but couldn't find it. I even have the same version you referenced (http://lua-users.org/lists/lua-l/2013-05/msg00070.html): i686-apple-darwin11 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336900) Using -O1 or -O0 as you suggested avoids this issue. Thank you. Paul.