我正在编写的 Pygame 测试程序中出现了一个奇怪的问题。我已将其简化为这个测试用例：
import pygame
import turtle
pygame.init()
window = pygame.display.set_mode((800, 800))
tile = pygame.Surface((800, 800))
tile.fill((255,255,255))
finished = False
while not finished:
window.fill((255,255,255))
for event in pygame.event.get():
if event.type == pygame.QUIT:
finished = True
window.blit(tile, (0,0))
pygame.display.flip()
t = turtle.Turtle()
t.color('green')
t.dot()
测试用例实际上并没有做任何事情——它只是显示一个白屏。当您关闭白屏时，它应该使用 Turtle 绘制一个绿点。相反，Python 崩溃了，我得到了这个堆栈跟踪：
2013-09-03 22:53:17.263 Python[38648:f07] -[SDLApplication _setup:]: unrecognized selector sent to instance 0x1095228f0
2013-09-03 22:53:17.264 Python[38648:f07] An uncaught exception was raised
2013-09-03 22:53:17.264 Python[38648:f07] -[SDLApplication _setup:]: unrecognized selector sent to instance 0x1095228f0
2013-09-03 22:53:17.266 Python[38648:f07] (
0 CoreFoundation 0x00000001002d60a6 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00000001008fa3f0 objc_exception_throw + 43
2 CoreFoundation 0x000000010036c6ea -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
3 CoreFoundation 0x00000001002c45ce ___forwarding___ + 414
4 CoreFoundation 0x00000001002c43b8 _CF_forwarding_prep_0 + 232
5 Tk 0x00000001093f05c0 TkpInit + 453
6 Tk 0x000000010936ca66 Tk_Init + 1816
7 _tkinter.so 0x000000010923ad2b Tcl_AppInit + 75
8 _tkinter.so 0x00000001092381b4 Tkinter_Create + 916
9 Python 0x00000001000c1e7d PyEval_EvalFrameEx + 25213
10 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
11 Python 0x000000010003d910 function_call + 176
12 Python 0x000000010000c362 PyObject_Call + 98
13 Python 0x000000010001e97b instancemethod_call + 363
14 Python 0x000000010000c362 PyObject_Call + 98
15 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
16 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
17 Python 0x000000010003d910 function_call + 176
18 Python 0x000000010000c362 PyObject_Call + 98
19 Python 0x000000010001e97b instancemethod_call + 363
20 Python 0x000000010000c362 PyObject_Call + 98
21 Python 0x00000001000ba947 PyEval_CallObjectWithKeywords + 87
22 Python 0x0000000100021c0e PyInstance_New + 126
23 Python 0x000000010000c362 PyObject_Call + 98
24 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
25 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
26 Python 0x000000010003d910 function_call + 176
27 Python 0x000000010000c362 PyObject_Call + 98
28 Python 0x000000010001e97b instancemethod_call + 363
29 Python 0x000000010000c362 PyObject_Call + 98
30 Python 0x0000000100078d58 slot_tp_init + 88
31 Python 0x0000000100074cc5 type_call + 245
32 Python 0x000000010000c362 PyObject_Call + 98
33 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
34 Python 0x00000001000c286d PyEval_EvalFrameEx + 27757
35 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
36 Python 0x000000010003d910 function_call + 176
37 Python 0x000000010000c362 PyObject_Call + 98
38 Python 0x000000010001e97b instancemethod_call + 363
39 Python 0x000000010000c362 PyObject_Call + 98
40 Python 0x0000000100078d58 slot_tp_init + 88
41 Python 0x0000000100074cc5 type_call + 245
42 Python 0x000000010000c362 PyObject_Call + 98
43 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
44 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
45 Python 0x00000001000c4266 PyEval_EvalCode + 54
46 Python 0x00000001000e8ede PyRun_FileExFlags + 174
47 Python 0x00000001000e9199 PyRun_SimpleFileExFlags + 489
48 Python 0x000000010010006d Py_Main + 3085
49 Python 0x0000000100000f14 Python + 3860
)
2013-09-03 22:53:17.267 Python[38648:f07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SDLApplication _setup:]: unrecognized selector sent to instance 0x1095228f0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001002d60a6 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00000001008fa3f0 objc_exception_throw + 43
2 CoreFoundation 0x000000010036c6ea -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
3 CoreFoundation 0x00000001002c45ce ___forwarding___ + 414
4 CoreFoundation 0x00000001002c43b8 _CF_forwarding_prep_0 + 232
5 Tk 0x00000001093f05c0 TkpInit + 453
6 Tk 0x000000010936ca66 Tk_Init + 1816
7 _tkinter.so 0x000000010923ad2b Tcl_AppInit + 75
8 _tkinter.so 0x00000001092381b4 Tkinter_Create + 916
9 Python 0x00000001000c1e7d PyEval_EvalFrameEx + 25213
10 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
11 Python 0x000000010003d910 function_call + 176
12 Python 0x000000010000c362 PyObject_Call + 98
13 Python 0x000000010001e97b instancemethod_call + 363
14 Python 0x000000010000c362 PyObject_Call + 98
15 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
16 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
17 Python 0x000000010003d910 function_call + 176
18 Python 0x000000010000c362 PyObject_Call + 98
19 Python 0x000000010001e97b instancemethod_call + 363
20 Python 0x000000010000c362 PyObject_Call + 98
21 Python 0x00000001000ba947 PyEval_CallObjectWithKeywords + 87
22 Python 0x0000000100021c0e PyInstance_New + 126
23 Python 0x000000010000c362 PyObject_Call + 98
24 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
25 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
26 Python 0x000000010003d910 function_call + 176
27 Python 0x000000010000c362 PyObject_Call + 98
28 Python 0x000000010001e97b instancemethod_call + 363
29 Python 0x000000010000c362 PyObject_Call + 98
30 Python 0x0000000100078d58 slot_tp_init + 88
31 Python 0x0000000100074cc5 type_call + 245
32 Python 0x000000010000c362 PyObject_Call + 98
33 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
34 Python 0x00000001000c286d PyEval_EvalFrameEx + 27757
35 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
36 Python 0x000000010003d910 function_call + 176
37 Python 0x000000010000c362 PyObject_Call + 98
38 Python 0x000000010001e97b instancemethod_call + 363
39 Python 0x000000010000c362 PyObject_Call + 98
40 Python 0x0000000100078d58 slot_tp_init + 88
41 Python 0x0000000100074cc5 type_call + 245
42 Python 0x000000010000c362 PyObject_Call + 98
43 Python 0x00000001000bf2c8 PyEval_EvalFrameEx + 14024
44 Python 0x00000001000c4149 PyEval_EvalCodeEx + 2137
45 Python 0x00000001000c4266 PyEval_EvalCode + 54
46 Python 0x00000001000e8ede PyRun_FileExFlags + 174
47 Python 0x00000001000e9199 PyRun_SimpleFileExFlags + 489
48 Python 0x000000010010006d Py_Main + 3085
49 Python 0x0000000100000f14 Python + 3860
)
libc++abi.dylib: terminate called throwing an exception
Abort trap: 6
细节：
$ python --version
> Python 2.7.3
$ sw_vers
> ProductName: Mac OS X
> ProductVersion: 10.8.2
> BuildVersion: 12C3012
我不确定如何调试它（或者即使我正在做的事情是有效的）所以欢迎任何反馈。