micropython/tests/basics/try_except_break.py

# test deep unwind via break from nested try-except (22 of them)
while True:
 print(1)
 try:
  try:
   try:
    try:
     try:
      try:
       try:
        try:
         try:
          try:
           try:
            try:
             try:
              try:
               try:
                try:
                 try:
                  try:
                   try:
                    try:
                     try:
                      try:
                       print(2)
                       break
                       print(3)
                      except:
                       pass
                     except:
                      pass
                    except:
                     pass
                   except:
                    pass
                  except:
                   pass
                 except:
                  pass
                except:
                 pass
               except:
                pass
              except:
               pass
             except:
              pass
            except:
             pass
           except:
            pass
          except:
           pass
         except:
          pass
        except:
         pass
       except:
        pass
      except:
       pass
     except:
      pass
    except:
     pass
   except:
    pass
  except:
   pass
 except:
  pass
print(4)
py/bc: Fix size calculation of UNWIND_JUMP opcode in mp_opcode_format. Prior to this patch mp_opcode_format would calculate the incorrect size of the MP_BC_UNWIND_JUMP opcode, missing the additional byte. But, because opcodes below 0x10 are unused and treated as bytes in the .mpy load/save and freezing code, this bug did not show any symptoms, since nested unwind jumps would rarely (if ever) reach a depth of 16 (so the extra byte of this opcode would be between 0x01 and 0x0f and be correctly loaded/saved/frozen simply as an undefined opcode). This patch fixes this bug by correctly accounting for the additional byte. . 2019-09-01 21:30:16 -06:00			`# test deep unwind via break from nested try-except (22 of them)`
			`while True:`
			`print(1)`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`try:`
			`print(2)`
			`break`
			`print(3)`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`except:`
			`pass`
			`print(4)`