Steps to reproduce

Run the counter app, but add a runtime error inside the _increment function. Launch this app on chrome and click the button, then open up the console window.

You will see these are not printed as errors, but just normal text.

Expected results

I would expect all errors to be printed as errors.

Note that on other platforms, these errors are emitted on stderr and not stdout like print messages are.

This is ultimately the root cause of dart-lang/ai#283 - we listen to the stderr VM service stream for flutter app runtime errors, but we never get any.

The dwds tool which converts the chrome debug protocol to the VM service protocol treats console.log messages as "stdout" messages, and console.error messages as "stderr", which is I think the best we can do.

Actual results

I do see the errors but on the stdout stream, which means we can't tell the difference between errors and regular debugging output.