Add application example

Author: corona10

Python/flowgraph.c

@@ -48,6 +48,7 @@ is_jump(cfg_instr *i)
     return OPCODE_HAS_JUMP(i->i_opcode);
 }
 
+
 /* One arg*/
 #define INSTR_SET_OP1(I, OP, ARG) \
     do { \
@@ -1495,6 +1496,8 @@ optimize_basic_block(PyObject *const_cache, basicblock *bb, PyObject *consts)
                 if (opcode == nextop &&
                     oparg == bb->b_instr[i+1].i_oparg &&
                     bb->b_instr[i].i_loc.lineno == bb->b_instr[i+1].i_loc.lineno) {
+                    assert(OPCODE_NO_EXCEPTION(opcode));
+                    assert(OPCODE_NO_EXCEPTION(nextop));
                     bb->b_instr[i].i_opcode = POP_TOP;
                     bb->b_instr[i].i_oparg = 0;
                 }