close b err=close_errors:16: body-boom | close a err=close_errors:16: body-boom | -> ok=false err=close_errors:16: body-boom
close c err=nil | close b (raises) | close a err=close_errors:9: b-fail | -> ok=false err=close_errors:9: b-fail
close b (raises) | close a err=close_errors:9: b-fail | -> ok=false err=close_errors:9: b-fail