shopify-scripts: Null pointer dereference in OP_ENTER

PoC === The following demonstrates a crash: class A def foo end end class B argv = ary-ptr; gdb p ary $1 = struct RArray 0x0 Test platform ============= Linux Mint 17.3 Cinnamon 64-bit, built with gcc version 4.8.4 Ubuntu 4.8.4-2ubuntu114.04.3 mruby SHA: a14a930c800aa50a191922580d53a2ce09287912...