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[Backtracing][Linux] Include declarations for gettid() and tgkill().

3

Older glibc doesn't include these. Nor does Musl, it seems. The previous fix put the `gettid()` declaration too far down the file. rdar://110417355

al45tair

[Backtracing][Linux] Replace regex with ProcMapsScanner.

3

We were using a regular expression to scan `/proc//maps`, but we shouldn't really do that because it breaks non-bootstrapped builds. Resolves #66457. rdar://110452324

al45tair

[CMake] Prevent rebuilds of pure swift libraries and executables

2

`.swiftmodule` is listed as an output of pure swift libraries, but it isn't updated if there's been no changes (just like the library and its object files). Add it to...

bnbarham

Enable IRGen/protocol_metadata test on Apple Silicon

1

This requirement seems to be too restrictive. The test works for me as-is on an M2 Max (removing the REQUIRES line, of course). I assume the intention is to limit...

karwa

Assigning to `self` in a `Never` initializer using a `switch` expression crashes the compiler

4

This crashes in SILGen: ```swift extension Never { init(value: Self) { self = switch value { case let v: v } } } ``` ``` Assertion failed: (hasValidInsertionPoint()), function insertImpl,...

hamishknight

**Motivation** While prototyping a solution to [this](https://github.com/apple/swift/issues/66420) issue, I encountered a strange behavior of the optimizer. It appears that the optimizer considers `init` with an assignment to a class `let`...

DmT021

[DNM] Test build.ps1 on VS2022 CI

12

Testing https://github.com/apple/swift/pull/64948 on the `main-windows-vs2022` to see if the CI hits the same issues.

tristanlabelle

Allow protocols to be nested in non-generic contexts

10

Allows protocols to be nested in non-generic types/functions. Gated behind flag `-enable-experimental-feature NestedProtocols`. SE proposal coming soon. TODO: - [ ] Test that ASTPrinter adds feature guards around uses of...

karwa

Do not merge.

aschwaighofer

[DNM] Experiment with Void? rule for if/switch expressions

4

hamishknight