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kotlinlang

why does idea mark StringBuffer.append(Charsequence) as a blocking call?

it's `synchronized` so it is potentially blocking. use StringBuilder if you don't need thread safety

i just noticed i was indeed using StringBuilder, which is not synchronized, and idea complained for that. I just mixed it up here in my error report. so why does idea complain for StringBuilder.append ?

I think that's a bug on IntelliJ's part, probably already reported, where it thinks that the overriden method `Appendable.append(CharSequence) throws IOException` is still an IO call for the `StringBuilder`