ipython intermittently segfaults when figure is closed (Mac OS X)

[kghose]

Problem

ipython will exit with segfault after I close a figure. Problem is intermittent - have not found a way to deterministically cause the crash.

Specs

Mac OS X 10.5.8
Python 2.6.4 (r264:75821M, Oct 27 2009, 19:48:32)
IPython 0.11.dev
matplotlib.version = 1.0.1

Error

objc[56139]: FREED(id): message removeFromSuperviewWithoutNeedingDisplay sent to freed object=0x19b37470

Mac OS Trace

Date/Time: 2011-07-15 21:47:54.500 -0400
OS Version: Mac OS X 10.5.8 (9L30)
Report Version: 6
Anonymous UUID: 655916BF-D521-48C5-B8A3-FBC5E5FA6683

Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Crashed Thread: 0

Application Specific Information:
objc[56139]: FREED(id): message removeFromSuperviewWithoutNeedingDisplay sent to freed object=0x19b37470

Thread 0 Crashed:
0 libobjc.A.dylib 0x90595bfa _objc_error + 116
1 libobjc.A.dylib 0x90595c30 __objc_error + 52
2 libobjc.A.dylib 0x90594637 _freedHandler + 58
3 com.apple.CoreFoundation 0x93faa676 CFArrayApplyFunction + 198
4 com.apple.AppKit 0x91a0aadc -[NSView _finalizeWithReferenceCounting] + 712
5 com.apple.AppKit 0x91a0a7e8 -[NSView dealloc] + 46
6 com.apple.Foundation 0x9524e68f NSPopAutoreleasePool + 1007
7 _macosx.so 0x02932580 wait_for_stdin + 561 (_macosx.m:171)
8 readline.so 0x0133bac0 call_readline + 432
9 org.python.python 0x001e04de PyOS_Readline + 254
10 org.python.python 0x0028dbfc builtin_raw_input + 412
11 org.python.python 0x00296165 PyEval_EvalFrameEx + 19429
12 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
13 org.python.python 0x0029634c PyEval_EvalFrameEx + 19916
14 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
15 org.python.python 0x0029634c PyEval_EvalFrameEx + 19916
16 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
17 org.python.python 0x0029634c PyEval_EvalFrameEx + 19916
18 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
19 org.python.python 0x0029634c PyEval_EvalFrameEx + 19916
20 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
21 org.python.python 0x0029634c PyEval_EvalFrameEx + 19916
22 org.python.python 0x002982dd PyEval_EvalCodeEx + 2109
23 org.python.python 0x002983f7 PyEval_EvalCode + 87
24 org.python.python 0x002bcf08 PyRun_FileExFlags + 168
25 org.python.python 0x002bddf3 PyRun_SimpleFileExFlags + 867
26 org.python.python 0x002cf902 Py_Main + 3122
27 org.python.python 0x00001f82 0x1000 + 3970
28 org.python.python 0x00001ea9 0x1000 + 3753

[daehyok]

I have the same problem in my machine. Needs immediate attention on it for many mac users.

[minrk]

I'm pretty sure this has been fixed (or at least improved) in matplotlib master. Try building matplotlib master, or get one of the matplotlib eggs from Fonnesbeck's Superpack: http://stronginference.com/scipy-superpack/

Note that IPython runs exactly zero objc code, so this is presumably a matplotlib issue. You would likely see this same issue if you were running matplotlib from the pure Python command prompt (not that anyone would do that).

[minrk]

Closing as not an IPython issue. Do reopen or reply if you can reproduce the issue with current dev matplotlib.

[kghose]

Thanks for the feedback guys!