crash - Xcode在界面生成器中意外退出

Question

我在Xcode(Cocoa App OSX，Objective-C)中启动了一个新项目。每次我尝试向Interface Builder中的窗口添加按钮(拖放)时，都会收到以下错误，并且Xcode退出。
“无法排除的异常(NSUnknownKeyException):[valueForUndefinedKey:]:此类与键springLoaded的键值编码不兼容。”

优胜美地10.10.3上的Xcode版本6.3(6D570)

任何人都经历过这种行为吗？

崩溃的一部分:

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000

Application Specific Information:
ProductBuildVersion: 6D570
UNCAUGHT EXCEPTION (NSUnknownKeyException): [<NSButton 0x7fb46e18f090> valueForUndefinedKey:]: this class is not key value coding-compliant for the key springLoaded.
UserInfo: {
    NSTargetObjectUserInfoKey = "<NSButton: 0x7fb46e18f090>";
    NSUnknownUserInfoKey = springLoaded;
}
Hints: None
Backtrace:
  0  0x00007fff90a4c4f4 __exceptionPreprocess (in CoreFoundation)
  1  0x00000001050ee184 DVTFailureHintExceptionPreprocessor (in DVTFoundation)
  2  0x00007fff90d1976e objc_exception_throw (in libobjc.A.dylib)
  3  0x00007fff90a4c0a9 -[NSException raise] (in CoreFoundation)
  4  0x00007fff8dc77d25 -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] (in Foundation)
  5  0x00007fff8db4cccb -[NSObject(NSKeyValueCoding) valueForKey:] (in Foundation)

更新:
Xcode现在以某种方式幸免于按钮添加，但是当我尝试保存时，收到此警报:
不幸的是，这发生在Xcode 6.3.1中

Answer 1

终于我从苹果开发论坛得到了答案。

原因是我使用OSX种子构建OS X 10.10.3(14D87h)。

This is new API related to Force Touch trackpads. It was added in OS X 10.10.3, but only in seed builds