Silence duplicate symbol runtime warning

[jpsim]

Similar to #4901 but updated with a new warning from Xcode 15 beta 1.

Unfortunately this doesn't appear to work, even with this change the warning is still logged:

objc[18947]: Class _TtC11SwiftParserP33_78149DB072C20084E7D780D86E26C3AF41StringLiteralExpressionIndentationChecker is implemented in both /private/var/tmp/_bazel_jp/d6a0d3abed4579623f79fc46ad4a7a79/execroot/_main/bazel-out/darwin_arm64-opt/bin/swiftlint (0x1059a79a0) and /Applications/Xcode-15.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftParser.dylib (0x10703da50). One of the two will be used. Which one is undefined.

It might have something to do with how long the symbol name is.

[jpsim]

Any thoughts @keith ?

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[keith]

Soo, the issue is related to the warning you're disabling. It's actually fixed if you change the name size from 64 to 128 (or probably just anything longer than this string) in objc_dupclass.h. I don't know why that works because it sure seems like dyld expects the strings to only be 64 characters https://github.com/apple-oss-distributions/dyld/blob/c8a445f88f9fc1713db34674e79b00e30723e79d/common/MachOAnalyzer.cpp#L4381 but it seems to so I guess I'd go with that!

[jpsim]

Thanks for digging into this, @keith. Indeed increasing the max dup class name length appears to resolve the issue with Xcode 15 beta 1 and beta 2.