error: redefinition of module 'SwiftBridging'

[shikiroot]

Output of brew config

HOMEBREW_VERSION: 4.4.4
ORIGIN: https://github.com/Homebrew/brew
HEAD: 824efa8836dc226aa92dbbf7404c1b4a66707cca
Last commit: 4 days ago
Core tap JSON: 08 Nov 05:49 UTC
Core cask tap JSON: 08 Nov 05:49 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 10
Homebrew Ruby: 3.3.5 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.5/bin/ruby
CPU: 10-core 64-bit arm_firestorm_icestorm
Clang: 16.0.0 build 1600
Git: 2.47.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.1-arm64
CLT: 16.1.0.0.1.1729049160
Xcode: N/A
Rosetta 2: false

Output of brew doctor

Warning: No Cask quarantine support available: unknown reason.

Description of issue

Device: M1 Pro MBP
OS: 15.1
While using brew upgrade <cask> or brew upgrade --greedy, return:

/Library/Developer/CommandLineTools/usr/include/swift/module.modulemap:13:8: error: redefinition of module 'SwiftBridging'
11 | //===----------------------------------------------------------------------===//
12 |
13 | module SwiftBridging {
   |        `- error: redefinition of module 'SwiftBridging'
14 |     header "bridging"
15 |

/Library/Developer/CommandLineTools/usr/include/swift/bridging.modulemap:13:8: note: previously defined here
11 | //===----------------------------------------------------------------------===//
12 |
13 | module SwiftBridging {
   |        `- note: previously defined here
14 |     header "bridging"
15 |

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Modules/Foundation.swiftmodule/arm64e-apple-macos.swiftinterface:5:8: error: failed to build module 'CoreFoundation'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.43 clang-1600.0.25.3)', while this compiler is 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)'). Please select a toolchain which matches the SDK.
    3 | // swift-module-flags: -target arm64e-apple-macos15.1 -target-variant arm64e-apple-ios18.1-macabi -enable-objc-interop -autolink-force-load -enable-library-evolution -module-link-name swiftFoundation -swift-version 5 -enforce-exclusivity=unchecked -O -library-level api -enable-upcoming-feature InferSendableFromCaptures -enable-bare-slash-regex -user-module-version 3107 -module-name Foundation -package-name "\"FoundationPreview\""
    4 | import Combine
    5 | import CoreFoundation
      |        `- error: failed to build module 'CoreFoundation'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.43 clang-1600.0.25.3)', while this compiler is 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)'). Please select a toolchain which matches the SDK.
    6 | import Darwin
    7 | import Dispatch

/Library/Developer/CommandLineTools/usr/include/swift/module.modulemap: 0:
/Library/Developer/CommandLineTools/usr/include/swift/bridging.modulemap: 0:
/opt/homebrew/Library/Homebrew/cask/utils/quarantine.swift:3:8: error: failed to build module 'Foundation'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.43 clang-1600.0.25.3)', while this compiler is 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)'). Please select a toolchain which matches the SDK.
 1 | #!/usr/bin/swift
 2 |
 3 | import Foundation
   |        `- error: failed to build module 'Foundation'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.43 clang-1600.0.25.3)', while this compiler is 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)'). Please select a toolchain which matches the SDK.
 4 |
 5 | struct SwiftErr: TextOutputStream {

Tried sudo rm -rf /Library/Developer/CommandLineTools/ and xcode-select --install, issue still exist.
Use swift $(brew --repo)/Library/Homebrew/cask/utils/quarantine.swift return same error.

[carlocab]

Seems related to Homebrew/brew#18656, and will likely be fixed by Homebrew/brew#18656 (comment)

[Bo98]

We've seen some reports of bugs with xcode-select --install where multiple CLT versions get installed together, which breaks things entirely.

If you can, it's worth trying sudo rm -rf /Library/Developer/CommandLineTools/ and then instead of xcode-select --install download "Command Line Tools for Xcode 16.1" from here: https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_16.1/Command_Line_Tools_for_Xcode_16.1.dmg (needs a developer account but that's free).

(note for future readers: check https://developer.apple.com/download/all/ if you're reading this a few weeks from now as there may be a newer version - 16.2 will probably be out in December)

[vikkastaneja]

I am also seeing the same behavior for 16.2. I don't know how to revert back to 16.1 without developer account, which apple is charging me 99 bucks. Any pointers?

[gromgit]

Go to the main Apple Developer download page. You'll have to login with your Apple ID, but you definitely don't have to fork over USD99.

[prantlf]

Go to the main Apple Developer download page. You'll have to login with your Apple ID, but you definitely don't have to fork over USD99.

I downloaded the 16.2 command-line dev tools, not the full Xcode, without spending a cent. I had to log in with my Apple account, of course, but that's free.

[prantlf]

swift $(brew --repo)/Library/Homebrew/cask/utils/quarantine.swift and brew doctor works without warnings on 16.1, but it started to happen again on 16.2; rolling back to 16.1 again helped. Is there any way to get it working on latest 16.2?

Both commands succeed on my machine with 16.2. swift is silent and doctor complains only about some deprecated packages.

[dcchambers]

I was also getting Swift errors when trying to upgrade homebrew casks after upgrading from MacOS 14 Sonoma to 15 Sequoia.

(Re)installing the command line tools via xcode-select --install did not work for me, but manually grabbing the 16.2 CLT .dmg from the apple developer website and then installing did fix the issue.

Not sure what's up with the xcode-select installer 🤷

[shikiroot]

Tried install Xcode from APP Store and remove CLT directory, problem solved.

[vikkastaneja]

I think reinstalling with xcode commandline install 16.3, which is causing the issue.

…

On Mon, Jan 27, 2025 at 12:18 PM Dakota Chambers ***@***.***> wrote: I was also getting Swift errors when trying to upgrades casks installed via Homebrew after upgrading from MacOS 14 Sonoma to 15 Sequoia. (Re)installing the command line tools via xcode-select --install did not work for me, but manually grabbing the 16.2 CLT .dmg from the apple developer website and then installing did fix the issue. Not sure what's up with the xcode-select installer 🤷 — Reply to this email directly, view it on GitHub <#5723 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AATBNWGBRLDC6HJ36N6EHZL2M2H7VAVCNFSM6AAAAABRMX4LR6VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCOJXGUYTCMA> . You are receiving this because you commented.Message ID: ***@***.***>