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### Reproduction
```swift
func f(_ c: [any RandomAccessCollection]) {
let _ = c.compactMap(\.last)
}
```
### Stack dump
```text
1. Apple Swift version 6.0 (swiftlang-6.0.0.9.10 cla…
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### Description
See https://forums.swift.org/t/xcode-16-type-cast-to-protocol-with-constrained-associated-type/74511
### Reproduction
```swift
import Foundation
let row:Any = TestRow()
if le…
-
```
$ cat foo.swift
public class Foo: Bar {
public func stuff() {}
}
$ difft --dump-ts foo.swift
source_file (0, 0) - (3, 0)
class_declaration (0, 0) - (2, 1)
modifiers (0, 0) - (0, …
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### Description
The SwiftIfConfig library has a `BuildConfiguration` protocol, but there is no concrete implementation of the `BuildConfiguration` protocol in the library. The only `BuildConfiguratio…
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### Description
Conforming an actor to a protocol with async initializers using synchronous initializers seems to crash the compiler using the new Swift 6/Xcode 16 toolchain.
### Reproduction
```sw…
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Hi Max,
I tried running ``` $ swift-dump myTest.app -o dumpDir ``` , but got command not found.
I could not find any swift-dump binary after make. So I copied the swiftd binary into /usr/local/bi…
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### Description
A compiler crash (assertion failure) occurs with `swift build --configuration release` on Windows ARM64. This is reproducible with Swift 6.0 and 6.0.1. With both Swift versions, th…
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### Description
Using FoundationXML.XMLDocument crashes the compiler.
### Reproduction
```swift
import FoundationXML
_ = try XMLDocument(xmlString: "foo", options: [])
```
`swift build`…
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### Description
we have again lost the ability to dump the symbol graph for the standard library
### Reproduction
```bash
$ swift symbolgraph-extract -module-name _Concurrency -target x86_64-unkno…
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### How frequently does the bug occur?
Always
### Description
The use of asyncWrite makes Xcode 16 unhappy upon compilation. This seems to be the case whether using Swift 5 or 6. Simple example:
…