bash prints errors for every non-existing command

[Baerenblau]

Hi,

I'm on macOS 14.4.1 (23E224) and continue to experience a long standing problem with bash from Macports

% which bash
/opt/local/bin/bash

% bash --version
GNU bash, Version 5.2.26(1)-release (x86_64-apple-darwin23.2.0)

For every command which is not found a error similar error like this is printed:

$ asdf
objc[1321]: +[__SwiftNativeNSStringBase initialize] may have been in progress in another thread when fork() was called.
objc[1321]: +[__SwiftNativeNSStringBase 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.
Abort trap: 6

Xcode has been installed today. Then MacPorts has been updated to the latest version, machine is rebooted, issue continues to exist.

Any ideas?

Thanks!