blocks|key|2329389|text|在guard构造中使用相同的常量名称时，我遇到了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2329390|let+activityVC+=+...
++++++++
guard+let+activityVC+=+activityVC+else+{+return+}|code-block|syntax|javascript|2329391|但是xcode没有对这一行显示任何警告。|2329392|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I faced this issue when used the same constant names in a guard construction
<pre><code>let activityVC = ...
 
guard let activityVC = activityVC else { return }
</code></pre>
But xcode didn't show me any warning for this row.

blocks|key|4441543|text|对于调试和发布，请转到项目Build+settings+->+Swift+Compiler+-+code+generation+->+Optimization+Level+->，选择选项“快速、单文件优化-O|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|4441544|​|4441545|📷|atomic|4441546|4441547|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/5fdf320fba373335a65b9a22238318f2.png|imageAlt^0|J|1U|2E|I|J|1U|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|12|8|@]|E|@]|F|$]]|$1|I|3|J|5|K|7|13|8|@]|E|@$9|14|A|15|1|16]]|F|$]]|$1|L|3|H|5|6|7|17|8|@]|E|@]|F|$]]|$1|M|3|-4|5|6|7|18|8|@]|E|@]|F|$]]]|N|$O|$5|P|Q|R|F|$S|T|U|-4]]]]

Go to project Build <code>settings -&gt; Swift Compiler - code generation -&gt; Optimization Level</code> -&gt; For both Debug &amp; Release select option &quot;Fast,Single-File Optimization[-O]
<a href="https://i.stack.imgur.com/ijTjv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ijTjv.png" alt="enter image description here" /></a>

blocks|key|5857354|text|我用Xcode7.0打开的所有Xcode6.3项目都有同样的问题。我创建了一个新项目，复制了我所有的源文件和资源，一切工作正常，没有这个编译器错误。我认为这与项目设置有关。我把Swift编译优化设置为"none“，Trap+6就消失了。也许还有其他设置，这也会产生麻烦，但对我来说，这就是问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5857355|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I have the same problem with all Xcode 6.3 projects, I open in Xcode 7.0. 
I created a new project, copied all my source files and resources and everything worked without this compiler error. 
I thought this has something to do with the project settings.
I turned off the Swift compile Optimization to "none" and the Trap 6 was gone away. Perhaps there are other settings, which also generate trouble, but for me this it was.

blocks|key|2328383|text|在我的情况下|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2328384|错误|2328385|override+func+observeValueForKeyPath(keyPath:+(String!)?,+ofObject+object:+(AnyObject!)?,+change:+([NSObject+:+AnyObject]!)?,+context:+UnsafeMutablePointer<Void>)|code-block|syntax|javascript|2328386|好的|2328387|override+func+observeValueForKeyPath(keyPath:+String?,+ofObject+object:+AnyObject?,+change:+[NSObject+:+AnyObject]?,+context:+UnsafeMutablePointer<Void>)|2328388|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

In my case

Error

<pre><code>override func observeValueForKeyPath(keyPath: (String!)?, ofObject object: (AnyObject!)?, change: ([NSObject : AnyObject]!)?, context: UnsafeMutablePointer&lt;Void&gt;)
</code></pre>

Ok

<pre><code>override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [NSObject : AnyObject]?, context: UnsafeMutablePointer&lt;Void&gt;)
</code></pre>

blocks|key|1785328|text|这对我很有效，所以试一试吧。在将代码从swift+3转换到swift+4时，我得到了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1785329|只需转到Project>Target>Build设置，搜索“Swift编译器-代码生成”，并将优化级别设置为“No+Optimization+-Onone”。|1785330|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This worked for me, so just give it a try. i got this error while converting the code from swift 3 to swift 4.
Simply, go to Project&gt;Target&gt;Build Setting and search 'Swift Compiler - Code Generation' and set Optimization level to 'No Optimization[-Onone]'.

blocks|key|1781682|text|我在XCode+7+Beta5上也得到了这个错误。在我清理了构建之后，我又得到了另一个错误，说我的类中有一个不符合我刚刚更改的协议。在我修复这个问题之后，它就会构建。我所做协议更改是将方法的两个参数类型从Int更改为Int32|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1781683|entityMap^0|2U|3|30|5|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

I got this error too on XCode 7 Beta 5. After I clean the build, then I got another error saying one of my class not conforming to the protocol I just changed. After I fix the issue, it builds. The protocol changes I made is to change two parameter type of a method from <code>Int</code> to <code>Int32</code>

blocks|key|2328656|text|在我的情况下，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2328657|编译器会给我这样的信息：|2328658|Incorrect+number+of+arguments+passed+to+called+function!
%254+=+call+%25swift.type*+@_T015SimplifiedCoder6StructVMa()+#1,+!dbg+!3112
<unknown>:0:+error:+fatal+error+encountered+during+compilation;+please
file+a+bug+report+with+your+project+and+the+crash+log
<unknown>:0:+note:+Broken+function+found,+compilation+aborted!|code-block|syntax|javascript|2328659|但是我意识到我遗漏了一个默认的泛型参数：|2328660|class+Class<K>+{
++++init<T:+Protocol>(_+value:+T)+where+T.Key+==+K+{}
}

protocol+Protocol+{
++++associatedtype+Key
++++static+func+getClass<NewKey>(_:+NewKey.Type)+->+Class<NewKey>
}

struct+Struct<K>:+Protocol+{

++++typealias+Key+=+K

++++static+func+getClass<NewKey>(_:+NewKey.Type)+->+Class<NewKey>+{
++++++++let+_self+=+Struct<NewKey>()
++++++++return+Class(_self)
++++}
}

protocol+CanGetClass+{
++++associatedtype+StructType:+Protocol
}

extension+CanGetClass+{
++++func+getClass<Key>(_:+Key.Type)+->+Class<Key>+{
++++++++return+StructType.getClass(Key.self)
++++}
}

struct+R:+CanGetClass+{
++++typealias+StructType+=+Struct
}|2328661|已更改：|2328662|typealias+StructType+=+Struct|2328663|至：|2328664|typealias+StructType+=+Struct<Int>|2328665|CanGetClass的扩展试图对不完整的类型调用getClass。|2328666|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

In my case,

The compiler would give me the message:

<pre><code>Incorrect number of arguments passed to called function!
%4 = call %swift.type* @_T015SimplifiedCoder6StructVMa() #1, !dbg !3112
&lt;unknown&gt;:0: error: fatal error encountered during compilation; please
file a bug report with your project and the crash log
&lt;unknown&gt;:0: note: Broken function found, compilation aborted!
</code></pre>

but I realized that I missed a default generic parameter:

<pre><code>class Class&lt;K&gt; {
 init&lt;T: Protocol&gt;(_ value: T) where T.Key == K {}
}

protocol Protocol {
 associatedtype Key
 static func getClass&lt;NewKey&gt;(_: NewKey.Type) -&gt; Class&lt;NewKey&gt;
}

struct Struct&lt;K&gt;: Protocol {

 typealias Key = K

 static func getClass&lt;NewKey&gt;(_: NewKey.Type) -&gt; Class&lt;NewKey&gt; {
 let _self = Struct&lt;NewKey&gt;()
 return Class(_self)
 }
}

protocol CanGetClass {
 associatedtype StructType: Protocol
}

extension CanGetClass {
 func getClass&lt;Key&gt;(_: Key.Type) -&gt; Class&lt;Key&gt; {
 return StructType.getClass(Key.self)
 }
}

struct R: CanGetClass {
 typealias StructType = Struct
}
</code></pre>

changed: 

<pre><code>typealias StructType = Struct
</code></pre>

to: 

<pre><code>typealias StructType = Struct&lt;Int&gt;
</code></pre>

the extension of CanGetClass tried to call getClass on an incomplete type.

blocks|key|2328674|text|当我这样做的时候，我收到了这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2328675|protocol+ProtocolA+{
++++associatedtype+BType:+ProtocolB
}

protocol+ProtocolB+{
++++associatedtype+AType:+ProtocolA
}|code-block|syntax|javascript|2328676|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I received this when did that:

<pre><code>protocol ProtocolA {
 associatedtype BType: ProtocolB
}

protocol ProtocolB {
 associatedtype AType: ProtocolA
}
</code></pre>

blocks|key|4441808|text|确保你没有在类扩展中实现私有协议。大多数情况下，使用私有协议会很奇怪，但这并不是必需的，这取决于您希望封装的内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4441809|类似于，在同一文件中：|4441810|class+C:+...+{
}

extension+C:+P+{
}

private+protocol+P:+class+{
}|code-block|syntax|javascript|4441811|这样做，你肯定会得到Command+failed+due+to+signal:+Abort+trap:+6|offset|length|style|CODE|4441812|相反，从协议中删除private修饰符，错误就会得到修复。|4441813|entityMap^0|0|0|0|A|17|0|9|7|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@$K|Z|L|10|M|N]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Make sure you don't implement a private protocol into class extension. Most of the time would be quite strange to have a private protocol, but not necessary, depending on what you wish to encapsulate.

Something like, in the same file:

<pre><code>class C: ... {
}

extension C: P {
}

private protocol P: class {
}
</code></pre>

Do this an you'll surely get <code>Command failed due to signal: Abort trap: 6</code>

Instead remove the <code>private</code> modifier from the protocol and the error is fixed.

blocks|key|4441895|text|当我试图运行测试时，我得到了这个错误。为了解决这个问题，我将这个脚本放到了Terminal中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4441896|rm+-rf+~/Library/Developer/Xcode/DerivedData|offset|length|style|CODE|4441897|删除派生数据解决了此问题|4441898|entityMap^0|0|0|18|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

I got this error when attempting to run tests.
To solve it, I put this script into Terminal:

<code>rm -rf ~/Library/Developer/Xcode/DerivedData</code>

Deleting derived data resolved the issue

blocks|key|5858228|text|我可以通过更改桥接头来解决这个问题。在我的例子中，添加一个换行符就足够了。非常奇怪的虫子。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858229|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I was able to resolve it by making a change to the bridging header. In my case adding a line break was sufficient. Very strange bug.

blocks|key|5858448|text|我在guard语句中错误地使用了类似的常量"name“，导致了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858449|guard+let+model+=+DataModel(JSON:+response),
++++++let+model+=+model.first+else+{+return+}|code-block|syntax|javascript|5858450|在上面的例子中，常量名称"model“被使用了两次，改用新的常量名称。|5858451|guard+let+parsedObj+=+DataModel(JSON:+response),
++++++let+model+=+parsedObj.first+else+{+return+}|5858452|注意:+Xcode编译器在编译时不会警告你这一点。|5858453|另外，请检查此答案，它有助于确定此错误的原因。https://stackoverflow.com/a/67620285/5433935|offset|length|5858454|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/67620285/5433935^0|0|0|0|0|0|N|18|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

I made mistake of using similar constant &quot;name&quot; in guard statement, causing this error.
<pre><code>guard let model = DataModel(JSON: response),
 let model = model.first else { return }
</code></pre>
In above example, constant name &quot;model&quot; is used twice, use new constant name instead.
<pre><code>guard let parsedObj = DataModel(JSON: response),
 let model = parsedObj.first else { return }
</code></pre>
NOTE: Xcode compiler do not warn you on this in compilation.
Please also check this answer which help to identify cause of this error.
<a href="https://stackoverflow.com/a/67620285/5433935">https://stackoverflow.com/a/67620285/5433935</a>

blocks|key|1782129|text|我的代码因为嵌套函数而崩溃。示例代码如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1782130|错误：|1782131|extension+UILabel+{
++++
++++var+attributedTextTruncates:+Bool+{
++++++++
++++++++guard+numberOfLines+>+0+else+{+return+false+}
++++++++return+countLabelLines()+>+numberOfLines
++++++++
++++++++func+countLabelLines()+->+Int+{
++++++++++++guard+let+myText+=+attributedText+else+{return+0}
++++++++++++
++++++++++++let+labelSize+=+myText.boundingRect(with:+CGSize(width:+self.bounds.width,+height:+CGFloat.greatestFiniteMagnitude),+options:+NSStringDrawingOptions.usesLineFragmentOrigin,+context:+nil)
++++++++++++return+Int(ceil(CGFloat(labelSize.height)+/+self.font.lineHeight))
++++++++}
++++}
}|code-block|syntax|javascript|1782132|正确的代码：|1782133|extension+UILabel+{
++++
++++var+attributedTextTruncates:+Bool+{
++++++++guard+numberOfLines+>+0+else+{+return+false+}
++++++++return+countLabelLines()+>+numberOfLines
++++}
++++
++++private+func+countLabelLines()+->+Int+{
++++++++guard+let+myText+=+attributedText+else+{return+0}
++++++++let+labelSize+=+myText.boundingRect(with:+CGSize(width:+self.bounds.width,+height:+CGFloat.greatestFiniteMagnitude),+options:+NSStringDrawingOptions.usesLineFragmentOrigin,+context:+nil)
++++++++return+Int(ceil(CGFloat(labelSize.height)+/+self.font.lineHeight))
++++}
}|1782134|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

My code was crashing because of nested function.
Example code is below :
Error :
<pre><code>extension UILabel {
 
 var attributedTextTruncates: Bool {
 
 guard numberOfLines &gt; 0 else { return false }
 return countLabelLines() &gt; numberOfLines
 
 func countLabelLines() -&gt; Int {
 guard let myText = attributedText else {return 0}
 
 let labelSize = myText.boundingRect(with: CGSize(width: self.bounds.width, height: CGFloat.greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, context: nil)
 return Int(ceil(CGFloat(labelSize.height) / self.font.lineHeight))
 }
 }
}
</code></pre>
Correct Code :
<pre><code>extension UILabel {
 
 var attributedTextTruncates: Bool {
 guard numberOfLines &gt; 0 else { return false }
 return countLabelLines() &gt; numberOfLines
 }
 
 private func countLabelLines() -&gt; Int {
 guard let myText = attributedText else {return 0}
 let labelSize = myText.boundingRect(with: CGSize(width: self.bounds.width, height: CGFloat.greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, context: nil)
 return Int(ceil(CGFloat(labelSize.height) / self.font.lineHeight))
 }
}
</code></pre>

blocks|key|2328402|text|在我的例子中，导致错误的原因是将函数中参数的值设置为nil。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2328403|之前：|2328404|public+func+comparableValidator<T:+Comparable>(minValue+:+T?+=+nil,+maxValue+:+T?+=+nil,+value:+T)+->+Void+{
++++if+let+min+=+minValue+{
++++++++_assertFunc(min+<=+value,+"\(value)+must+be+at+least+\(min)")
++++}

++++if+let+max+=+maxValue+{
++++++++_assertFunc(max+>=+value,+"\(value)+must+be+at+most+\(max)")
++++}
}|code-block|syntax|javascript|2328405|之后：|2328406|public+func+comparableValidator<T:+Comparable>(minValue+:+T?,+maxValue+:+T?,+value:+T)+->+Void+{
++++if+let+min+=+minValue+{
++++++++_assertFunc(min+<=+value,+"\(value)+must+be+at+least+\(min)")
++++}

++++if+let+max+=+maxValue+{
++++++++_assertFunc(max+>=+value,+"\(value)+must+be+at+most+\(max)")
++++}
}|2328407|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

In my case, it was with setting a value to a parameter in a function to nil that was causing the error.

Before:

<pre><code>public func comparableValidator&lt;T: Comparable&gt;(minValue : T? = nil, maxValue : T? = nil, value: T) -&gt; Void {
 if let min = minValue {
 _assertFunc(min &lt;= value, "\(value) must be at least \(min)")
 }

 if let max = maxValue {
 _assertFunc(max &gt;= value, "\(value) must be at most \(max)")
 }
}
</code></pre>

After:

<pre><code>public func comparableValidator&lt;T: Comparable&gt;(minValue : T?, maxValue : T?, value: T) -&gt; Void {
 if let min = minValue {
 _assertFunc(min &lt;= value, "\(value) must be at least \(min)")
 }

 if let max = maxValue {
 _assertFunc(max &gt;= value, "\(value) must be at most \(max)")
 }
}
</code></pre>

blocks|key|1781563|text|我能够用Xcode7.0beta+(7A120f)中创建的全新项目简单而一致地再现这一点。请注意，问题可能比示例更广泛，但这对我来说是100%25可重现的，只需在新项目中添加一行。这个问题似乎也只适用于iOS，而不是OS+X，至少在这个例子中是这样。已经向苹果提交了错误报告#+21376523。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1781564|1781565|在Xcode7.0+(7A120f)中创建一个全新的项目。类型是“游戏”，语言是"Swift"，游戏技术是"SceneKit".|ordered-list-item|1781566|Build，并以默认设置运行。项目在模拟器中构建和运行良好(您将看到默认的旋转3D宇宙飞船模型)。|1781567|为GameViewController.swift添加了一个SCNVector3属性，如下所示：|1781568|1781569|类GameViewController:+UIViewController+{+var+p=+SCNVector3Zero+|1781570|-->产生“中止陷阱:+6”。项目将不再编译。|1781571|1781572|将常量更改为空的初始值设定项。|1781573|1781574|类GameViewController:+UIViewController+{+var+p=+SCNVector3()+|1781575|-->同样的问题，“中止陷阱:+6”|1781576|1781577|Remove属性，正在还原到干净的项目状态。|1781578|1781579|-->+"Abort+trap:+6“消失，项目重新编译并运行。|1781580|1781581|将"var“改为"let”。|1781582|1781583|类GameViewController:+UIViewController+{设p=+class|1781584|--+>编译并运行。|1781585|1781586|将属性类型更改为SCNVector4而不是SCNVector3。|1781587|1781588|类GameViewController:+UIViewController+{+var+p=var|1781589|--+>编译并运行。|1781590|编辑:这个问题在Xcode7.0beta-2+(7A121l)中得到了修复，如果你因为使用了一个浮动3向量类型(比如SCNVector3)而得到了"Abort+trap:+6“。从发行说明中：|1781591|1781592|·调用接受SIMD+float3参数的C或Objective-C函数时，编译器崩溃的问题已修复。(21294916)|blockquote|1781593|1781594|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1R|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1T|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|1U|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|1V|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1X|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|P|3|Q|5|E|7|20|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|21|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|22|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|23|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|24|8|@]|9|@]|A|$]]|$1|X|3|Y|5|E|7|25|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|27|8|@]|9|@]|A|$]]|$1|12|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|13|3|14|5|E|7|29|8|@]|9|@]|A|$]]|$1|15|3|-4|5|6|7|2A|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2B|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2C|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|E|7|2E|8|@]|9|@]|A|$]]|$1|1D|3|-4|5|6|7|2F|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1G|3|1H|5|6|7|2H|8|@]|9|@]|A|$]]|$1|1I|3|1J|5|6|7|2I|8|@]|9|@]|A|$]]|$1|1K|3|-4|5|6|7|2J|8|@]|9|@]|A|$]]|$1|1L|3|1M|5|1N|7|2K|8|@]|9|@]|A|$]]|$1|1O|3|-4|5|6|7|2L|8|@]|9|@]|A|$]]|$1|1P|3|-4|5|6|7|2M|8|@]|9|@]|A|$]]]|1Q|$]]

I am able to reproduce this simply and consistently with a brand-new project created in Xcode 7.0 beta (7A120f). Note that the problem is likely more broad than the example, but this is 100% reproducible for me by only adding a single line to a new project. This problem also appears to exclusively apply to iOS, not OS X, at least for this example. Have submitted bug report # 21376523 to Apple.

<ol>
<li>Create a brand-new project in Xcode 7.0 (7A120f). Type is "Game", Language is "Swift", Game Technology is "SceneKit".</li>
<li>Build and run with default settings. Project builds and runs fine in simulator (you will see the default rotating 3D spaceship model).</li>
<li>Add a single SCNVector3 property to GameViewController.swift, like this:

<pre><code>class GameViewController: UIViewController { 
 var p = SCNVector3Zero 
</code></pre></li>
</ol>

--> Produces "Abort trap: 6". Project will no longer compile.

<ol start="4">
<li>Change the constant to an empty initializer.

<pre><code>class GameViewController: UIViewController { 
 var p = SCNVector3() 
</code></pre></li>
</ol>

--> Same problem, "Abort trap: 6"

<ol start="5">
<li>Remove property, restoring to the clean project state.</li>
</ol>

--> "Abort trap: 6" is gone, project again compiles and runs.

<ol start="6">
<li>Change "var" to "let".

<pre><code>class GameViewController: UIViewController { 
 let p = SCNVector3Zero
</code></pre></li>
</ol>

-- > Compiles and runs.

<ol start="7">
<li>Change property type to SCNVector4 instead of SCNVector3.

<pre><code>class GameViewController: UIViewController { 
 var p = SCNVector4Zero
</code></pre></li>
</ol>

-- > Compiles and runs.

EDIT: This problem is fixed in Xcode 7.0 beta-2 (7A121l), if you are getting "Abort trap: 6" due to using a float 3 vector type (such as SCNVector3). From the release notes:

<blockquote>
 • A compiler crash when calling C or Objective-C functions that take
 SIMD float3 parameters has been fixed. (21294916)
</blockquote>

blocks|key|1785085|text|好吧，在我的例子中，这是因为我在泛型类中嵌套了一个枚举。现在，奇怪的是，当我将问题隔离到BaseDao2中时，编译器告诉我正确的错误，但在我真正的BaseDao实现(有更多东西)中，它抛出了“陷阱6”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1785086|Type+'DaoError2'+nested+in+generic+type+'BaseDao2'+is+not+allowed|code-block|syntax|javascript|1785087|当我有这个的时候：|1785088|class+BaseDao2<T>:+InjectRestSession{

++++enum+DaoError2:+ErrorType{
++++++++case+FAILED_RESPONSE(String)
++++++++case+INVALID_RESULT(String)
++++++++case+FAIL_TO_LIST,+FAIL_TO_GET
++++}

++++func+get()+->+T?{
++++++++return+nil
++++}
}|1785089|无论如何，在我的例子中，我将DaoError移出BaseDao并编译所有内容。无论如何，我的感觉是“陷阱6”是一些无法编译的东西，编译器被搞糊涂了。从一个简单的案例开始，然后添加您认为可能导致问题的原因，可以帮助您通过获取正确的编译错误来识别问题。换句话说，你必须对swift编译器保持温和。|1785090|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Ok, in my case it was because I had an enum nested in a generic class. Now, the strange thing, is that when I isolated the problem (into the BaseDao2), the compiler told me the right error, but in my real BaseDao implementation (which has more stuff), it throw "trap 6". 

<pre><code>Type 'DaoError2' nested in generic type 'BaseDao2' is not allowed
</code></pre>

When I had this: 

<pre><code>class BaseDao2&lt;T&gt;: InjectRestSession{

 enum DaoError2: ErrorType{
 case FAILED_RESPONSE(String)
 case INVALID_RESULT(String)
 case FAIL_TO_LIST, FAIL_TO_GET
 }

 func get() -&gt; T?{
 return nil
 }
}
</code></pre>

Anyway, in my case, I move the DaoError out of the BaseDao and everything compiled. Anyway, my feeling is that "trap 6" is what something cannot compile and the compiler got confused. Starting from a simple case, and adding back what you think might be causing the problem can be helpul to identify the problem by getting the right compile error. In other word, you have to be gentle with the swift compiler.

blocks|key|5857493|text|这就是导致我出错的原因。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5857494|之前：|5857495|++++for+(key,value)+in+hash{
++++++++count+%2B=+value.count
++++}|code-block|syntax|javascript|5857496|之后：|5857497|++++for+(_,value)+in+hash{
++++++++count+%2B=+value.count
++++}|5857498|它不喜欢密钥在任何地方都不被使用。我不确定为什么它会导致构建失败。|5857499|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

This is what caused the error for me.

Before:

<pre><code> for (key,value) in hash{
 count += value.count
 }
</code></pre>

After:

<pre><code> for (_,value) in hash{
 count += value.count
 }
</code></pre>

It didn't like it that key was never being used anywhere. I am not sure why it should cause the build to fail though.

blocks|key|4441282|text|我设法通过在目标(而不是项目)设置中的“Swift编译器-代码生成”菜单中将优化级别设置为“无”来构建我的项目。请看下面的截图。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4441283|​|4441284|📷|atomic|offset|length|4441285|4441286|这不应该是一个永久性的解决方案，因为它使ipa的大小增加了一倍以上。当Xcode7从测试版中走出来时，应该可以重新开启优化。|4441287|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ba47074a667f6a57b7e80f8a98ab4c86.png|imageAlt^0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@$G|X|H|Y|1|Z]]|A|$]]|$1|I|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

I managed to get my project to build by setting the optimisation level to 'None' under the 'Swift Compiler - Code Generation' menu in the target (not the project) settings. See the screenshot below...

<img src="https://i.stack.imgur.com/PqILu.png" alt="enter image description here">

This shouldn't be a permanent solution because it more than doubles the size of the ipa. It should be possible to switch optimisation back on when Xcode 7 comes out of beta.

blocks|key|5857550|text|在我的例子中，我的@objc协议有可选的方法，当我在swift类中调用它的方法时，我得到了那个错误，在从协议中的函数中删除optional关键字后，错误就消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5857551|之前(有错误)：|5857552|@objc+protocol+SomeDelegate:NSObjectProtocol{

++++optional+func+someDelegateMethod()
}

class+MySwiftClass{
++++func+notifyMyDelegate(){
++++++++mydelegate?.someDelegateMethod?()+//this+line+caused+the+error
++++}
}|code-block|syntax|javascript|5857553|之后：|5857554|@objc+protocol+SomeDelegate:NSObjectProtocol{

++++func+someDelegateMethod()
}

class+MySwiftClass{
++++func+notifyMyDelegate(){
++++++++mydelegate?.someDelegateMethod()
++++}
}|5857555|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

In my case i had @objc protocol with optional methods and when i called its methods also in swift class i got that error, after removing the optional keyword from functions in the protocol the error was gone.

before (with error):

<pre><code>@objc protocol SomeDelegate:NSObjectProtocol{

 optional func someDelegateMethod()
}

class MySwiftClass{
 func notifyMyDelegate(){
 mydelegate?.someDelegateMethod?() //this line caused the error
 }
}
</code></pre>

after:

<pre><code>@objc protocol SomeDelegate:NSObjectProtocol{

 func someDelegateMethod()
}

class MySwiftClass{
 func notifyMyDelegate(){
 mydelegate?.someDelegateMethod()
 }
}
</code></pre>

blocks|key|5857575|text|对我来说..。我像这样修改了@objc函数的内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5857576|之前：|5857577|++++++++@objc+func+didConnectWithSession()+{
+++++++++++context!.stream.disconnectAfterSending()
++++++++}|code-block|syntax|javascript|5857578|之后：|5857579|++++++++@objc+func+didConnectWithSession()+{
+++++++++++//context!.stream.disconnectAfterSending()
++++++++}|5857580|这导致了错误。我通过删除整个函数解决了这个问题。|5857581|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

for me.. I modified the content of a @objc function like so:

before:

<pre><code> @objc func didConnectWithSession() {
 context!.stream.disconnectAfterSending()
 }
</code></pre>

after:

<pre><code> @objc func didConnectWithSession() {
 //context!.stream.disconnectAfterSending()
 }
</code></pre>

This caused the error. I resolved by removing the entire function.

blocks|key|2328624|text|在Failable初始化器中使用do-try-catch时，我收到了以下消息：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2328625|public+init?()+{
++++do+{
++++++++...
++++++++super.init(superParam:+try+getParamForSuper())
++++++++...
++++}+catch+{
++++++++...
++++}
}|code-block|syntax|javascript|2328626|将try调用移动到自己的本地变量时，编译成功：|2328627|public+init?()+{
++++do+{
++++++++...
++++++++let+superParam+=+try+getParamForSuper()
++++++++super.init(superParam:+superParam)
++++++++...
++++}+catch+{
++++++++...
++++}
}|2328628|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I got this message when using do-try-catch in a Failable initializer:

<pre><code>public init?() {
 do {
 ...
 super.init(superParam: try getParamForSuper())
 ...
 } catch {
 ...
 }
}
</code></pre>

The compilation succeeded when moving the try call to it's own local variable:

<pre><code>public init?() {
 do {
 ...
 let superParam = try getParamForSuper()
 super.init(superParam: superParam)
 ...
 } catch {
 ...
 }
}
</code></pre>

blocks|key|1781735|text|在我的例子中，我同时在class+A和extension+A中声明了一个private+struct+Constants。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1781736|也许它应该给出一个错误，但它没有。|1781737|entityMap^0|B|7|J|B|10|O|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

In my case I had a <code>private struct Constants</code> declared in both <code>class A</code> and <code>extension A</code>.

Probably it should be giving an error but it didn't.

blocks|key|4441614|text|对我来说，导致这个错误的原因是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4441615|我创建了一个文件来在UIView上创建扩展。在这个文件中，我创建了一个名为Foo的私有协议。|offset|length|style|CODE|4441616|然后我写了：|4441617|extension+UIView:+Foo|4441618|从协议中删除私有使错误消失。|4441619|我猜这可能是个bug。编译器应该警告我们这个问题。同样，它警告我们不能将私有一致性添加到类型中，它应该告诉我们一致性应该使用“公共/内部”协议。|4441620|entityMap^0|0|11|3|0|0|0|L|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@$D|X|E|Y|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|Q|$]]

To me what caused this error was: 

I created a file to create extensions on UIView. Inside this file, I created a private protocol named <code>Foo</code>.

Then I made: 

<code>extension UIView: Foo</code>

Removing the private from the protocol made the error go away. 

I guess this is probably a bug. The compiler should warn us about the issue. The same way it warns us we can't add private conformances to types it should tell us that conformance should be using a "public/internal" protocol.

blocks|key|1781831|text|我通过以下步骤解决了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1781832|平台安装运行'pod+deintegrate'|1781833|Makesure+podfile‘如下:+platform+:ios，'8.0’use_frameworks!|unordered-list-item|1781834|
|1781835|ran+'pod+‘|1781836|1781837|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

I resolved this problem with these steps:

<ol>
<li>ran 'pod deintegrate'</li>
<li>Makesure podfile like this: 
 platform :ios, '8.0'
 use_frameworks!</li>
<li>ran 'pod install'</li>
</ol>

blocks|key|1785305|text|在我的例子中，重命名init方法的几个参数，这是一个编译失败的协议。我通过一个接一个地解决它，在每次更改后再次编译。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1785306|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, renames several parameters of init methods which is a protocol fails the compilation. I solve it by do it one by one, compiles again after each change.

blocks|key|4441733|text|我也有同样的问题，我发现问题是我在读了一篇关于“如何加速你的构建”的文章(这是一篇btw+here)之后，我把构建系统改成了“新的构建系统”。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4441734|因此，回到标准构建系统|style|BOLD|4441735|要启用新的构建系统，请转至文件工作空间项目设置(或转至|4441736|ordered-list-item|4441737|+build+system+to+→Build+System.|4441738|4441739|4441740|​|4441741|📷|atomic|4441742|4441743|希望这对某些人有帮助，不要浪费时间去找出为什么这不起作用！|4441744|entityMap|0|LINK|mutability|MUTABLE|url|https://medium.com/rocket-fuel/optimizing-build-times-in-swift-4-dc493b1cc5f5|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/89b5818b116706db4526e41a22b10b8d.png|imageAlt^0|19|4|0|0|5|6|0|0|1|H|D|1|0|0|0|0|1|1|0|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@$A|1C|B|1D|1|1E]]|C|$]]|$1|D|3|E|5|6|7|1F|8|@$A|1G|B|1H|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|1I|8|@]|9|@]|C|$]]|$1|J|3|-4|5|K|7|1J|8|@]|9|@]|C|$]]|$1|L|3|M|5|K|7|1K|8|@$A|1L|B|1M|F|G]]|9|@]|C|$]]|$1|N|3|-4|5|6|7|1N|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1O|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1P|8|@]|9|@]|C|$]]|$1|R|3|S|5|T|7|1Q|8|@]|9|@$A|1R|B|1S|1|1T]]|C|$]]|$1|U|3|Q|5|6|7|1U|8|@]|9|@]|C|$]]|$1|V|3|W|5|6|7|1V|8|@]|9|@]|C|$]]|$1|X|3|-4|5|6|7|1W|8|@]|9|@]|C|$]]]|Y|$Z|$5|10|11|12|C|$13|14]]|15|$5|16|11|17|C|$18|19|1A|-4]]]]

I was having this same problem and I found the problem was that I had changed the build system to "New Build System" after reading an article on "how to speed up your builds" (This is the article btw <a href="https://medium.com/rocket-fuel/optimizing-build-times-in-swift-4-dc493b1cc5f5" rel="nofollow noreferrer">here</a>)

So to go back to the standard build system:

<ol>
<li>To enable the new build system, go to File → Project Settings (or Workspace Settings).</li>
<li>Change Build System to Standard Build System.</li>
</ol>

<a href="https://i.stack.imgur.com/S49SU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S49SU.png" alt="enter image description here"></a>

Hope it helps someone and don't waste hours trying to find out why this was not working!

blocks|key|5858045|text|我没有尝试其他的解决方案。我在这个设置中遇到了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858046|func+speacialAdd(_+num1:+Int,+to+num2:+Int){
++++func+specialMultiply(_+digit1:+Int,+with+digit2:+Int+=+num2){+//+SOURCE+OF+PROBLEM
++++++++print(digit2)
++++++++print(digit1)
++++}

++++specialMultiply(5)
}

class+ViewController:+UIViewController+{

++++override+func+viewDidLoad()+{
++++++++super.viewDidLoad()
++++++++print(speacialAdd(5,+to:+6))
++++}
}|code-block|syntax|javascript|5858047|这一行是问题的根源。将其缺省为参数似乎不适用于嵌套函数|5858048|func+specialMultiply(_+digit1:+Int,+with+digit2:+Int+=+num2)+//+ERROR|5858049|解决方案包括：|5858050|func+specialMultiply(_+digit1:+Int,+with+digit2:+Int)+//+OK
func+specialMultiply(_+digit1:+Int,+with+digit2:+Int+=+6)+//+OK|5858051|5858052|FWIW实际上我第一次写这个是在游乐场，得到了一个不同的错误：|5858053|5858054|游乐场执行失败：|blockquote|5858055|5858056|错误:无法查找符号：|5858057|__T013__lldb_expr_111speacialAddySi_Si2totF4num2L_Sifau|5858058|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|19|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1B|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1D|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1E|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|11|$]]

I didn't try other solutions. 
I got this problem for this setup: 

<pre><code>func speacialAdd(_ num1: Int, to num2: Int){
 func specialMultiply(_ digit1: Int, with digit2: Int = num2){ // SOURCE OF PROBLEM
 print(digit2)
 print(digit1)
 }

 specialMultiply(5)
}

class ViewController: UIViewController {

 override func viewDidLoad() {
 super.viewDidLoad()
 print(speacialAdd(5, to: 6))
 }
}
</code></pre>

This line is the source of problem. Defaulting it to a argument seems to not work for a nested function

<pre><code>func specialMultiply(_ digit1: Int, with digit2: Int = num2) // ERROR
</code></pre>

Solutions are:

<pre><code>func specialMultiply(_ digit1: Int, with digit2: Int) // OK
func specialMultiply(_ digit1: Int, with digit2: Int = 6) // OK
</code></pre>

<hr>

FWIW I actually first wrote this in playground and got a different error:

<blockquote>
 Playground execution failed:
 
 error: Couldn't lookup symbols: 
 __T013__lldb_expr_111speacialAddySi_Si2totF4num2L_Sifau
</blockquote>

blocks|key|1781922|text|在Xcode+9.3中，我重新安装了特定的pod，其中出现了警告，并再次n清除了派生数据。它对我很有效:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1781923|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In Xcode 9.3, I have re-installed the specific pod, in which warnings appeared and cleared derived data again n again. It worked for me :)

blocks|key|5858138|text|我通过转到Xcode+->偏好设置->位置->将Relative选项设置为派生数据来修复它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5858139|​|5858140|📷|atomic|5858141|5858142|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/cb49f13c01b993be4d8be88abdec458f.png|imageAlt^0|O|8|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|K|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S|T|-4]]]]

I fixed it by going to Xcode -> Preferences -> Locations -> Set <code>Relative</code> option to Derived Data.

<a href="https://i.stack.imgur.com/rhZK5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rhZK5.png" alt="Setting Derived Data"></a>

blocks|key|5858182|text|对我来说，这是MD5.swift问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858183|您需要做的就是在项目中搜索文件名"MD5.swift“，即使在pod中也是如此|5858184|并将所有内容替换为此处的此文件|5858185|https://github.com/onmyway133/SwiftHash/blob/master/Sources/MD5.swift|offset|length|5858186|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|1X|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@$H|U|I|V|1|W]]|A|$]]|$1|J|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|G]]]]

For me it was MD5.swift issue

What you have to do is search in your project for file name "MD5.swift" even in the pods

and replace all the content with this file here 

<a href="https://github.com/onmyway133/SwiftHash/blob/master/Sources/MD5.swift" rel="nofollow noreferrer">https://github.com/onmyway133/SwiftHash/blob/master/Sources/MD5.swift</a>

blocks|key|2329209|text|此问题在Xcode+10.2.1中仍然存在。在清理了build文件夹之后，错误消失了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2329210|entityMap^0|N|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

This issue is still present in Xcode 10.2.1. After cleaning the build folder, the error went away.

blocks|key|5858261|text|对于我来说，下面的语句导致一个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858262|let+dict+=+mainDict+as+[String:String]|code-block|syntax|javascript|5858263|通过force+unwraps解决此问题|offset|length|style|CODE|5858264|let+dict+=+mainDict+as!+[String:String]|5858265|没有任何与编译器相关的东西。这只是类型转换的问题，苹果应该给出正确的描述，而不是给编译器错误|BOLD|5858266|entityMap^0|0|0|2|D|0|0|0|1A|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@$I|W|J|X|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Z|8|@$I|10|J|11|K|Q]]|9|@]|A|$]]|$1|R|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|S|$]]

For me below statement cause an error.

<pre><code>let dict = mainDict as [String:String]
</code></pre>

Fix the issue by <code>force unwraps</code>

<pre><code>let dict = mainDict as! [String:String]
</code></pre>

There is nothing related to the compiler. It is just type casting issue, Apple should give proper description instead of the giving compiler error

blocks|key|2329269|text|我的案例，Swift+5.1，Xcode+10.3+(10G8)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2329270|当嵌套函数使用外部函数的参数作为默认参数时，代码会导致Swift崩溃。|2329271|例如：|2329272|func+foo(duration:+TimeInterval)+{
++++func+bar(duration:+TimeInterval+=+duration)+{
++++}
}|code-block|syntax|javascript|2329273|我希望这能帮到你。|2329274|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

My case, Swift 5.1, Xcode 10.3 (10G8)

Code was crashing Swift when a nested function was using the argument of an outer function as a default parameter.

e.g.

<pre><code>func foo(duration: TimeInterval) {
 func bar(duration: TimeInterval = duration) {
 }
}
</code></pre>

I hope this helps.

blocks|key|4442091|text|在我的例子中，搜索|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4442092|[String:+String]|code-block|syntax|javascript|4442093|替换为|4442094|[String:+Any]|4442095|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In my case search for 

<pre><code>[String: String]
</code></pre>

replace with 

<pre><code>[String: Any]
</code></pre>

blocks|key|4442121|text|在我的例子中，"Abort+trap:+6“的问题是由设置超类中定义的@Published属性的值引起的，这个超类继承自ObservableObject+(Swift+5)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4442122|错误：|4442123|class+MySuperClass+:+ObservableObject+{
+++@Published+var+myProperty+:+Int+=+0
}

class+MySubClass+:+MySuperClass+{
+++func+someFunc()+{
+++++myProperty+=+1
+++}
}|code-block|syntax|javascript|4442124|好的：|4442125|class+MySuperClass+:+ObservableObject+{
+++@Published+var+myProperty+:+Int+=+0

+++func+setMyProperty(value:+Int)+{
++++++myProperty+=+value
+++}
}

class+MySubClass+:+MySuperClass+{
+++func+someFunc()+{
+++++setMyProperty(value:+1)+
+++}
}|4442126|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

In my case the problem with "Abort trap: 6" was caused by setting a value of a @Published property defined in a super class, that inherits from ObservableObject (Swift 5). 

Error:

<pre><code>class MySuperClass : ObservableObject {
 @Published var myProperty : Int = 0
}

class MySubClass : MySuperClass {
 func someFunc() {
 myProperty = 1
 }
}
</code></pre>

Ok:

<pre><code>class MySuperClass : ObservableObject {
 @Published var myProperty : Int = 0

 func setMyProperty(value: Int) {
 myProperty = value
 }
}

class MySubClass : MySuperClass {
 func someFunc() {
 setMyProperty(value: 1) 
 }
}
</code></pre>

blocks|key|5858391|text|在Xcode11和swift+5中:转到项目构建设置->+Swift编译器-代码生成->调试和发布的优化级别->选择选项"No+Optimaiztion-Onone|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858392|​|5858393|📷|atomic|offset|length|5858394|5858395|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b3a0836e4f6ee8e4e629e4ef283e6840.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

in Xcode 11 and swift 5: Go to project Build settings -> Swift Compiler - code generation -> Optimization Level -> For both Debug &amp; Release select option "No Optimaiztion[-Onone]

<img src="https://i.stack.imgur.com/XvlV3.png" alt="enter image description here">

blocks|key|5858417|text|我的问题是这条线：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5858418|return+()|code-block|syntax|javascript|5858419|我删除了这行，问题就解决了！|5858420|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

My problem was with the line:
<pre><code>return ()
</code></pre>
i removed the line and problem fixed!

Since Xcode 7 and Swift 2.0, I get the error above, like in the screenshot shown here:

<img src="https://i.stack.imgur.com/r66S0.png" alt="screenshot of error log">

I have no idea where this is coming from, cleaning and deleting derived data didn't work.

Anyone else experiencing this problem?

Project settings:

<img src="https://i.stack.imgur.com/3IyxC.png" alt="project settings">

Target settings:

<img src="https://i.stack.imgur.com/MnIZR.png" alt="target settings">

Command failed due to signal: Abort trap: 6

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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从Xcode 7和Swift 2.0开始，我得到了上面的错误，如下面的屏幕截图所示：​​我不知道这是从哪里来的，清理和删除派生数据不起作用。还有谁遇到过这个问题吗？项目设置：​​目标设置：​​

问由于信号: Abort trap: 6，命令失败
EN

回答 37

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问由于信号: Abort trap: 6，命令失败EN

回答 37

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问由于信号: Abort trap: 6，命令失败
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