"contents.trim is not a function" in serverless 1.44.1

[ChristopheBougere]

Since I upgraded to serverless 1.44.1, I'm having this error:

npx serverless package

  Type Error ---------------------------------------------

  contents.trim is not a function

     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.

  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com

  Your Environment Information ---------------------------
     OS:                     darwin
     Node Version:           10.15.3
     Serverless Version:     1.44.1

Here is a reproduction code: serverless.yml

service: my-service

provider:
  name: aws
  runtime: nodejs10.x

plugins:
- serverless-step-functions
- serverless-stepfunction-validator

package.json

{
  "name": "repro-stepfunction-validator",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "dependencies": {},
  "devDependencies": {
    "serverless": "^1.44.1",
    "serverless-step-functions": "^1.21.1",
    "serverless-stepfunction-validator": "^1.3.0"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

[piercus]

@ChristopheBougere thank you for this information

Can you share the logs ? (you can get it by setting environment variable SLS_DEBUG=*)

Thank you

[ChristopheBougere]

Sure:

SLS_DEBUG=* npx serverless package
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command create
Serverless: Load command install
Serverless: Load command package
Serverless: Load command deploy
Serverless: Load command deploy:function
Serverless: Load command deploy:list
Serverless: Load command deploy:list:functions
Serverless: Load command invoke
Serverless: Load command invoke:local
Serverless: Load command info
Serverless: Load command logs
Serverless: Load command metrics
Serverless: Load command print
Serverless: Load command remove
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command slstats
Serverless: Load command plugin
Serverless: Load command plugin
Serverless: Load command plugin:install
Serverless: Load command plugin
Serverless: Load command plugin:uninstall
Serverless: Load command plugin
Serverless: Load command plugin:list
Serverless: Load command plugin
Serverless: Load command plugin:search
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command invoke
Serverless: Load command invoke:stepf
Serverless: Load command validate
Serverless: Invoke package
Serverless: Invoke aws:common:validate
Serverless: Invoke aws:common:cleanupTempDir

  Type Error ---------------------------------------------

  contents.trim is not a function

     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.

  Stack Trace --------------------------------------------

TypeError: contents.trim is not a function
    at match.replace (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:296:39)
    at String.replace (<anonymous>)
    at Variables.cleanVariable (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:294:25)
    at _.map.match (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:324:22)
    at arrayMap (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/lodash/lodash.js:639:23)
    at Function.map (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/lodash/lodash.js:9556:14)
    at Variables.getMatches (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:322:14)
    at Variables.populateValue (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:361:26)
    at requiredConfigs.map.config (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:134:16)
    at Array.map (<anonymous>)
    at disableDepedentServices (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:133:48)
    at Variables.disableDepedentServices (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:93:12)
    at Variables.prepopulateService (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:132:19)
    at initialCall (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:160:12)
    at Variables.initialCall (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:67:12)
    at Variables.populateService (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless/lib/classes/Variables.js:159:17)
    at serverless.variables.populateObject.then.parsedObject (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless-step-functions/lib/yamlParser.js:41:37)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)
    at process.topLevelDomainCallback (domain.js:120:23)
From previous event:
    at serverless.yamlParser.parse.then.serverlessFileParam (/Users/mbp/Desktop/repro-stepfunction-validator/node_modules/serverless-step-functions/lib/yamlParser.js:18:10)
    at process._tickCallback (internal/process/next_tick.js:68:7)

  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com

  Your Environment Information ---------------------------
     OS:                     darwin
     Node Version:           10.15.3
     Serverless Version:     1.44.1