^^^ Exactly, what's a big deal ? Xcode that was bundled with the OS update is flawed, Getting the fresh one directly fixes it.
kaban
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Angular SyntaxError: SyntaxError: Invalid regular expression: invalid group specifier name.
Found it, among dozens of thousands of code there was this line: const re = /(?=\()([^)]+)(?=\))/g;
It was not executed but apparently was being evaluatedbefore the main entry point got called, That's why no debugger could get to it.