[ruby-core:119285] [Ruby master Bug#20631] Build failure with Xcode 16 beta and macOS 15 (Sequoia) Beta

Issue #20631 has been updated by nobu (Nobuyoshi Nakada).


The Xcode version had no effect on this.
In fact, the same error appeared on macOS 15.0 for binaries built with either 16 RC or earlier versions.
Upgrading to macOS 15.1 beta (24B5046f) made the error go away.

----------------------------------------
Bug #20631: Build failure with Xcode 16 beta and macOS 15 (Sequoia) Beta
https://bugs.ruby-lang.org/issues/20631#change-109894

* Author: hsbt (Hiroshi SHIBATA)
* Status: Assigned
* Assignee: hsbt (Hiroshi SHIBATA)
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
I found some issues with Xcode 16 beta and macOS 15 (Sequoia) Beta.

`TestRubyOptions` and `TestVMDump` are failed with them.

full log: https://gist.github.com/hsbt/378fe2ba47e734f2562ba9a154e1795b

I'm not sure why macOS require `sudo` command for that.

----

And I and @katei also found the regression of https://bugs.ruby-lang.org/issues/18912#note-15.

```
>> pid = fork { p File.realpath "/" }
>> Process.waitpid(pid)
objc[82573]: +[NSPlaceholderMutableString initialize] may have been in progress in another thread when fork() was called.
objc[82573]: +[NSPlaceholderMutableString initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.
=> 82573
```





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