Fix handling of var_ssa_dest_and_src and reg_stack_ssa_dest_and_src

__init__.py

@@ -113,11 +113,12 @@ def graph_il_insn(g, head, il, label=None):
             # [<ssa <var struct B b> version 1>, <ssa <var struct B b> version 0>, 0, <il: 0x61>]
             if ty == 'reg_stack_ssa_dest_and_src' or ty == 'var_ssa_dest_and_src':
                 # handle the ssa_dest_and_src operand types
+                # This consumes two elements in ops, and only increase op_index once
                 next_label = 'next' if edge_label == 'prev' else 'dest'
                 graph_il_insn(g, record, o, next_label)
-                # This will consume an element in ops, without increacing op_index
                 _, o2 = next(ops)
                 graph_il_insn(g, record, o2, edge_label)
+                op_index += 1
             else:
                 # handle everything else
                 graph_il_insn(g, record, o, edge_label)