shopify-scripts: Null pointer dereference in mrb_str_concat

Hi, The following file causes a segmentation fault due to a null pointer in mrbstrconcat which calls mrbstrmodify then checkfrozen which tries to dereference it. "O=0" $ ./dev/bin/mruby --version mruby 1.2.0 2015-11-17 $ ./dev/bin/mruby crash.rb Segmentation fault: 11 $ lldb ./dev/bin/mruby...