try!(writeln!(file, "// MIR for `{}`", node_path));
try!(writeln!(file, "// node_id = {}", node_id));
try!(writeln!(file, "// pass_name = {}", pass_name));
try!(writeln!(file, "// MIR for `{}`", node_path));
try!(writeln!(file, "// node_id = {}", node_id));
try!(writeln!(file, "// pass_name = {}", pass_name));