'sls print' contains Warnings.

[shouki-s]

This is a Bug Report

Description

• What went wrong?

It came to occur since 1.36.0.
Output of sls print contains Warnings.

The reproduction code is as follows.

My serverless.yml:

service: servicename

provider:
  name: aws
  runtime: nodejs8.10

functions:
  function1:
    handler: lib/proxy.handler
  function2:
    handler: lib/proxy.handler

Yes, We have multiple functions having same handler.
The difference between the two functions is environment variables and so on.

shell script:

sls print

stdout:

Serverless: Warning: A handler "lib/proxy.handler" is duplicated in functions: function1, function2.
service: servicename
provider:
  name: aws
  runtime: nodejs8.10
functions:
  function1:
    handler: lib/proxy.handler
  function2:
    handler: lib/proxy.handler

• What did you expect should have happened?

sls print should output valid yaml.
Warnings should be written to stderr. Otherwise, sls print should not output warnings.

• What was the config you used?

As mentioned above.

• What stacktrace or error message from your provider did you see?

Similar or dependent issues:

Add warning for multiple functions having same handler: #4414 #5638

// I think that this warning itself is useful.

Additional Data

• Serverless Framework Version you're using: 1.36.0
• Operating System: darwin
• Stack Trace:
• Provider Error messages:

[uneco]

This issue has recurred in versions that use logInfo / logWarning / logError.

serverless/lib/classes/Error.js

Lines 30 to 45 in e1092af

	const writeMessage = (title, message) => {
	let line = '';
	while (line.length < 56 - title.length) {
	line = `${line}-`;
	}
	consoleLog(' ');
	consoleLog(chalk.yellow(` ${title} ${line}`));
	consoleLog(' ');
	if (message) {
	consoleLog(` ${message.split('\n').join('\n ')}`);
	}
	consoleLog(' ');
	};