[PD-dev] Pd: signal 6 and the [shell] object on OSX

[chris clepper]

On the MacIntel build I made I get this when sending a command to the
[shell] object:

Pd: signal 6
closing audio...
closing MIDI...
... done.

This actually registers as a crash in the crash logs but Pd keeps
running.  I use the -noaudio -nomidi flags but that doesn't seem to
turn audio and MIDI off fully.

Here's one of the thousands of crash reports:

Thread 0 Crashed:
0   libSystem.B.dylib         	0x900252a9 restore_sem_to_pool + 61
1   libSystem.B.dylib         	0x90001f5c pthread_mutex_lock + 518
2   com.apple.audio.CoreAudio 	0x9144297c CAMutex::Lock() + 58
3   com.apple.audio.CoreAudio 	0x914587cd
IOA_Device::StartCommandExecution(void**) + 41
4   com.apple.audio.CoreAudio 	0x914586a3
HP_Device::ExecuteCommand(HP_Command*) + 61
5   com.apple.audio.CoreAudio 	0x9145860d HP_Device::Do_StopAllIOProcs() + 65
6   com.apple.audio.CoreAudio 	0x9145859b
IOA_SingleDeviceManager::StopAllIOProcs() + 47
7   com.apple.audio.CoreAudio 	0x91458551 IOA_PlugIn::StopAllIOProcs() + 21
8   com.apple.audio.CoreAudio 	0x914584ea IOA_PlugIn::Teardown() + 242
9   com.apple.audio.CoreAudio 	0x914583c0
HP_PlugIn_Teardown(AudioHardwarePlugInInterface**) + 78
10  com.apple.audio.CoreAudio 	0x91458365 HALPlugIn::Teardown() + 21
11  com.apple.audio.CoreAudio 	0x91458198 HALPlugInManagement::Teardown() + 240
12  com.apple.audio.CoreAudio 	0x9145809f HALSystem::TeardownDevices() + 11
13  com.apple.audio.CoreAudio 	0x9145803c HALSystem::AtExitHandler() + 124
14  com.apple.audio.CoreAudio 	0x91457f9b HALAtExit::AtExitHandler() + 79
15  libSystem.B.dylib         	0x90010d0c __cxa_finalize + 237
16  libSystem.B.dylib         	0x90010c08 exit + 24
17  shell.pd_darwin           	0x0ad44d4c shell_anything + 745 (bundle1.s:110)
18  pd                        	0x00037a63 pd_typedmess + 340 (m_class.c:754)
19  pd                        	0x00038fbf outlet_anything + 78 (m_obj.c:386)
20  pd                        	0x00037a63 pd_typedmess + 340 (m_class.c:754)
21  pd                        	0x0003af58 binbuf_eval + 931 (m_binbuf.c:574)
22  pd                        	0x00008f37 message_bang + 43 (g_text.c:294)
23  pd                        	0x00038d24 outlet_bang + 56 (m_obj.c:327)
24  pd                        	0x0003ec01 sched_tick + 100 (m_sched.c:356)
25  pd                        	0x0003f00a m_scheduler + 898 (m_sched.c:460)
26  pd                        	0x00040bcb sys_main + 1239 (s_main.c:294)
27  pd                        	0x00001f8a _start + 228 (crt.c:272)
28  pd                        	0x00001ea5 start + 41


cgc