I've got some old Objective-C code that up until Xcode 15 was compiling just fine. I recently spent time converting a lot of my project to Swift, which meant putting more stuff in the Bridging Header, but everything was fine. Till today.
In file included from /Users/rmann/Projects/Personal/MyApp/repo/src/objc/MissionList/EventListCell.mm:18:
In file included from /Users/rmann/Library/Developer/Xcode/DerivedData/MyApp-hkqhwvmmxqyxlkdlbpsbletzgerr/Build/Intermediates.noindex/MyApp.build/Debug-iphonesimulator/MyApp.build/DerivedSources/MyApp-Swift.h:288:
In file included from /Users/rmann/Projects/Personal/MyApp/repo/src/BridgingHeader.h:8:
/Users/rmann/Projects/Personal/MyApp/repo/src/objc/HessianClasses/CWHessianArchiver.h:52:55: error: reference to 'Protocol' is ambiguous
+(void)setClassName:(NSString*)className forProtocol:(Protocol*)aProtocol;
^
note: candidate found by name lookup is 'Protocol'
note: candidate found by name lookup is 'Protocol'
This is code that uses NSProxy and passes it an Objective-C protocol. The build transcript does not show the locations of the alleged declarations. If I use Shift-Command-O and type "Protocol", I get /Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/objc/Protocol.h, which is unexpected, given that I'm running Xcode 15 beta 2. xcode-select -p gives /Applications/Xcode-beta.app/Contents/Developer.
I call this a bug, as it compiles fine in Xcode 14.3, and if it should be an error, it should say why it's ambiguous. FB12434640
