Question

当我尝试编译Swift项目时，我遇到了分段错误。

以下是我的代码的简化版本，它会导致错误：

enum PluginType
{
    case PluginC
    case PluginD
}

class Plugin
{
    var pluginType : PluginType
    var setter : Void -> Void
    var unsetter : Void -> Void

    init(pluginType : PluginType, setter : Void -> Void, unsetter : Void -> Void)
    {
        self.pluginType = pluginType
        self.setter = setter
        self.unsetter = unsetter
    }
}

@objc protocol BProtocol
{
    func getPlugins() -> [Plugin]
}

class B : BProtocol
{
    var a : AProtocol?

    func getPlugins() -> [Plugin]
    {
        return [Plugin(pluginType : .PluginC, setter : a!.setPluginC, unsetter : a!.unsetPluginC),
            Plugin(pluginType : .PluginD, setter : a!.setPluginD, unsetter: a!.unsetPluginD)]
    }
}

@objc protocol AProtocol
{
    func setPluginC()
    func unsetPluginC()
    func setPluginD()
    func unsetPluginD()
}

class A : AProtocol
{
    var b : BProtocol?

    func setPluginC()
    {

    }

    func unsetPluginC()
    {

    }

    func setPluginD()
    {

    }

    func unsetPluginD()
    {

    }
}

问题来自这种方法：

    func getPlugins() -> [Plugin]
    {
        return [Plugin(pluginType : .PluginC, setter : a!.setPluginC, unsetter : a!.unsetPluginC),
            Plugin(pluginType : .PluginD, setter : a!.setPluginD, unsetter: a!.unsetPluginD)]
    }

问题是由我初始化的setter和unsetter引起的。

这是Xcode上的错误：

0 swift 0x000000010456a028   llvm :: sys :: PrintStackTrace（__ sFILE *）+ 40 1 swift
  0x000000010456a514 SignalHandler（int）+ 452 2   libsystem_platform.dylib 0x00007fff9596f5aa _sigtramp + 26 3   libsystem_platform.dylib 0x000007f83527198b _sigtramp + 2677023739 4   swift 0x00000001049290df   swift :: AbstractStorageDecl :: hasObjCGetterAndSetter（）const + 31 5   swift 0x0000000104929205   swift :: AbstractStorageDecl :: requiresObjCGetterAndSetter（）const + 69 6   swift 0x00000001039ff3f4   迅速降低:: :: SILGenFunction :: emitGetAccessor（SWIFT :: SILLocation，   swift :: AbstractStorageDecl *，llvm :: ArrayRef，   swift :: Lowering :: RValueSource＆amp;＆amp;，bool，swift :: Lowering :: RValue＆amp;＆amp;，   swift :: Lowering :: SGFContext）+ 68 7 swift
  0x0000000103a15ca4   迅速降低:: :: SILGenFunction :: emitRValueForPropertyLoad（SWIFT :: SILLocation，   swift :: Lowering :: ManagedValue，bool，swift :: VarDecl *，   llvm :: ArrayRef，bool，swift :: Type，   swift :: Lowering :: SGFContext）+ 1284 8 swift
  0x0000000103a2a012 swift :: ASTVisitor＆lt;（匿名   namespace）:: RValueEmitter，swift :: Lowering :: RValue，void，void，void，   void，void，swift :: Lowering :: SGFContext＆gt; :: visit（swift :: Expr *，   swift :: Lowering :: SGFContext）+ 28402 9 swift
  0x0000000103a2b6ed   迅速降低:: :: SILGenFunction :: emitRValueAsSingleValue（SWIFT :: Expr的*   swift :: Lowering :: SGFContext）+ 45 10 swift
  0x00000001039f3720   迅速降低:: :: RValueSource :: getAsSingleValue（SWIFT ::降低:: SILGenFunction和放大器;，   swift :: Lowering :: SGFContext）＆amp;＆amp; + 176 11 swift
  0x0000000103a44154   迅速降低:: :: RValueSource :: forwardInto（SWIFT ::降低:: SILGenFunction和放大器;，   swift :: Lowering :: AbstractionPattern，swift :: Lowering :: Initialization *，   swift ::降低:: TypeLowering const＆amp;）＆amp;＆amp; + 260 12 swift
  0x0000000103a4400e   迅速降低:: :: RValueSource ::兑现（迅速降低:: :: SILGenFunction和放大器;，   swift :: Lowering :: AbstractionPattern，swift :: SILType）＆amp;＆amp; + 334 13迅速   0x0000000103a340fc   迅速降低:: :: SILGenFunction :: emitInjectOptionalValueInto（SWIFT :: SILLocation，   swift :: Lowering :: RValueSource＆amp;＆amp;，swift :: SILValue，   swift :: Lowering :: TypeLowering const＆amp;）+ 268 14 swift
  0x0000000103a2b1fb swift :: ASTVisitor＆lt;（匿名   namespace）:: RValueEmitter，swift :: Lowering :: RValue，void，void，void，   void，void，swift :: Lowering :: SGFContext＆gt; :: visit（swift :: Expr *，   swift :: Lowering :: SGFContext）+ 32987 15 swift
  0x0000000103a2a325 swift :: ASTVisitor＆lt;（匿名   namespace）:: RValueEmitter，swift :: Lowering :: RValue，void，void，void，   void，void，swift :: Lowering :: SGFContext＆gt; :: visit（swift :: Expr *，   swift :: Lowering :: SGFContext）+ 29189 16 swift
  0x0000000103a2b63f   swift :: Lowering :: SILGenFunction :: emitIgnoredExpr（swift :: Expr *）+ 191   17 swift 0x0000000103a483f9   swift ::降低:: SILGenFunction :: visitBraceStmt（swift :: BraceStmt *）+   297 18 swift 0x0000000103a4b2d4   swift :: ASTVisitor :: visit（swift :: Stmt *）+ 148 19 swift
  0x0000000103a188c3   swift :: Lowering :: SILGenFunction :: emitFunction（swift :: FuncDecl *）+ 243   20 swift 0x00000001039f8646   swift :: Lowering :: SILGenModule :: emitFunction（swift :: FuncDecl *）+ 230 21   swift 0x0000000103a12763   swift :: ASTVisitor :: visit（swift :: Decl *）+ 355 22 swift
  0x0000000103a1112b SILGenType :: emitType（）+ 203 23 swift
  0x0000000103a0c0fe   迅速降低:: :: SILGenModule :: visitNominalTypeDecl（SWIFT :: NominalTypeDecl *）   + 30 24 swift 0x00000001039fa5cb swift ::降低:: SILGenModule :: emitSourceFile（swift :: SourceFile *，   unsigned int）+ 411 25 swift 0x00000001039fa88f   swift :: SILModule :: constructSIL（swift :: Module *，swift :: SourceFile *，   swift ::可选）+ 335 26 swift
  0x00000001039fa9d8 swift :: performSILGeneration（swift :: SourceFile＆amp ;,,   swift ::可选）+ 72 27 swift
  0x00000001038dfda9 frontend_main（llvm :: ArrayRef，char   const *，void *）+ 3353 28 swift 0x00000001038dd94d   main + 1677 29 libdyld.dylib 0x00007fff99b5c5fd start + 1   30 libdyld.dylib 0x000000000000015a start + 1716140894

我正在寻找一种解决方法来避免＆＃34;分段错误＆＃34;用编译器。

有什么建议吗？

谢谢！

Answer 1

最后，我找到了一个解决方法：

func getPlugins() -> [Plugin]
{
    return [Plugin(pluginType : .PluginC, setter : { a!.setPluginC() }, unsetter : { a!.unsetPluginC() }),
        Plugin(pluginType : .PluginD, setter : { a!.setPluginD() }, unsetter: { a!.unsetPluginD() })]
}

这适用于Xcode 6.1

使用Swift项目编译时Xcode 6.0.1分段错误

1 个答案: