Command failed due to signal: Abort trap: 6

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 [here][1])

So to go back to the **standard build system**:

1. To enable the new build system, go to File → Project Settings (or Workspace Settings).
2. Change Build System to **Standard Build System**.

[![enter image description here][2]][2]

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

[1]:

[To see links please register here]

[2]:

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.

I resolved this problem with these steps:

1. ran 'pod deintegrate'

2. Makesure podfile like this:
platform :ios, '8.0'
use_frameworks!

3. ran 'pod install'

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 `Foo`.

Then I made:

`extension UIView: Foo`

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.

In my case I had a `private struct Constants` declared in both `class A` and `extension A`.

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

I received this when did that:


protocol ProtocolA {
associatedtype BType: ProtocolB
}

protocol ProtocolB {
associatedtype AType: ProtocolA
}

In my case,

The compiler would give me the message:

Incorrect number of arguments passed to called function!
%4 = call %swift.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!

but I realized that I missed a default generic parameter:

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
}

changed:

typealias StructType = Struct

to:

typealias StructType = Struct<Int>

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

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

public init?() {
do {
...
super.init(superParam: try getParamForSuper())
...
} catch {
...
}
}

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

public init?() {
do {
...
let superParam = try getParamForSuper()
super.init(superParam: superParam)
...
} catch {
...
}
}

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 `Int` to `Int32`

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

before:

@objc func didConnectWithSession() {
context!.stream.disconnectAfterSending()
}
after:

@objc func didConnectWithSession() {
//context!.stream.disconnectAfterSending()
}

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