Multithreading 简单Mac ProgressIndicator会导致崩溃：“；被抓到导致过度唤醒”；

我有这个按钮点击处理程序（OS X 10.9.3上的MonoMac）：

但是，当我按下按钮运行代码时，主线程会停止，并出现以下错误：

（lldb）退出*thread#1:tid=0x2bf20，0x98fd9f7a libsystem_kernel.dylib`mach_msg_trap+10，queue='com.apple.main thread'，停止原因=SIGSTOP信号

并且，以下日志记录在系统日志中：

2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]: 1 +0.000001 sec [0de1/1503]: error: ::read ( 0, 0x107557a40, 1024 ) => -1 err = Connection reset by peer (0x00000036)
2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]: 2 +0.000001 sec [0de1/0303]: error: ::ptrace (request = PT_THUPDATE, pid = 0x0ddc, tid = 0x1a03, signal = -1) err = Invalid argument (0x00000016)
2014/05/21 13:10:51.753 com.apple.debugserver-310.2[3553]: Exiting.
2014/05/21 13:11:05.000 kernel[0]: process <AppName>[3548] caught causing excessive wakeups. Observed wakeups rate (per sec): 1513; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45061
2014/05/21 13:11:05.302 ReportCrash[3555]: Invoking spindump for pid=3548 wakeups_rate=1513 duration=30 because of excessive wakeups
2014/05/21 13:11:07.452 spindump[3556]: Saved wakeups_resource.spin report for <AppName> version 1.2.1.0 (1) to /Library/Logs/DiagnosticReports/<AppName>_2014-05-21-131107_<UserName>-MacBook-Pro.wakeups_resource.spin

2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]：1+0.000001秒[0de1/1503]：错误：读取（0，0x107557a40，1024）=>-1错误=对等方重置连接（0x00000036）
2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]：2+0.000001秒[0de1/0303]：错误：：：ptrace（请求=PT_THUPDATE，pid=0x0ddc，tid=0x1a03，信号=-1）err=无效参数（0x00000016）
2014/05/21 13:10:51.753 com.apple.debugserver-310.2[3553]：退出。
2014/05/21 13:11:05.000内核[0]：进程[3548]被捕获，导致过度唤醒。观察到的唤醒率（每秒）：1513；最大允许唤醒率（每秒）：150；观察时间：300秒；任务生存期唤醒次数：45061
2014/05/21 13:11:05.302 ReportCrash[3555]：调用spindump以获得pid=3548唤醒率=1513持续时间=30，因为唤醒过多
2014/05/21 13:11:07.452 spindump[3556]：已将版本1.2.1.0（1）的wakeups_resource.spin报告保存到/Library/Logs/DiagnosticReports/_2014-05-21-131107_u-MacBook-Pro.wakeups_resource.spin

从上面摘录：

最大允许唤醒率（每秒）：150；观察时间：300秒；任务生命周期唤醒次数：45061

如果我删除
ProgressIndicator.StartAnimation（此选项），则问题不会发生和<代码>ProgressIndicator.StopAnimation（此）行

为什么主线程被SIGSTOP停止？
您是否有一个小的示例应用程序，可以用来演示这个问题？
2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]: 1 +0.000001 sec [0de1/1503]: error: ::read ( 0, 0x107557a40, 1024 ) => -1 err = Connection reset by peer (0x00000036)
2014/05/21 13:10:51.752 com.apple.debugserver-310.2[3553]: 2 +0.000001 sec [0de1/0303]: error: ::ptrace (request = PT_THUPDATE, pid = 0x0ddc, tid = 0x1a03, signal = -1) err = Invalid argument (0x00000016)
2014/05/21 13:10:51.753 com.apple.debugserver-310.2[3553]: Exiting.
2014/05/21 13:11:05.000 kernel[0]: process <AppName>[3548] caught causing excessive wakeups. Observed wakeups rate (per sec): 1513; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45061
2014/05/21 13:11:05.302 ReportCrash[3555]: Invoking spindump for pid=3548 wakeups_rate=1513 duration=30 because of excessive wakeups
2014/05/21 13:11:07.452 spindump[3556]: Saved wakeups_resource.spin report for <AppName> version 1.2.1.0 (1) to /Library/Logs/DiagnosticReports/<AppName>_2014-05-21-131107_<UserName>-MacBook-Pro.wakeups_resource.spin