'no-unused-vars' flag despite being used in a template string

[Shockolate]

What version of ESLint are you using?
v2.9.0

What parser (default, Babel-ESLint, etc.) are you using?
The default, I believe.

Please show your full configuration:

extends: airbnb
env:
  node: true
  mocha: true
  es6: true
rules:
  consistent-return: off
  strict: off
  no-console: off

What did you do? Please include the actual source code causing the issue.
I'm new to Javascript, so don't judge my code too harshly...

function sqlExecute(nameAndSqlParams, callback) {
  return sql.execute(nameAndSqlParams.seriateParams).then(
    (data) => (callback(null, data)),
    (err) => (callback('Error ${nameAndSqlParams.name} : ${err}'))
  );
}

What did you expect to happen?
No error or flag should be thrown with the no-unused-vars set to on.

What actually happened? Please include the actual, raw output from ESLint.

$ ./node_modules/eslint/bin/eslint.js src/Persistence.js
   10:6   error  'err' is defined but never used      no-unused-vars
✖ 4 problems (4 errors, 0 warnings)

[ben-page]

The problem is that your string isn't a template string. Template strings use backticks (`). Your string uses single quotes (').

[ben-page]

function sqlExecute(nameAndSqlParams, callback) {
  return sql.execute(nameAndSqlParams.seriateParams).then(
    (data) => (callback(null, data)),
    (err) => (callback(`Error ${nameAndSqlParams.name} : ${err}`))
  );
}

[Shockolate]

The flag was no longer thrown when using the Grave Accent.
I didn't think to use the Grave Accent for my application was working with the Single Quote.
Closing