Pylint and Pep8 both enabled result in a pylint failure to run

[wscullen]

• VSCode Version: 1.30 (both windows 7 and Ubuntu 18.04.1)
• OS Version: Windows 7, Ubuntu 18.04.1

Steps to Reproduce:

1. Install Python extension
2. Create pipenv virtualenv or a venv virtualenv (happens regardless of virtualenv)
3. Install pylint, pep8 into virtualenv
4. Enable pylint and pep8 through the User Settings:

  "python.linting.enabled": true,
  "python.linting.pylintEnabled": true,
  "python.linting.lintOnSave": true,
  "python.linting.pep8Enabled": true,

5. Results in "There was an error in running the linter 'pylint'
   OUTPUT:
   Linting with pylint failed.

TypeError: Converting circular structure to JSON
##########Linting Output - pep8##########
9,80,E,E501:line too long (84 > 79 characters)
13,80,E,E501:line too long (105 > 79 characters)

Disabling one of pylint or pep8 removes the issue.

Was under the impression that multiple linters can be run simulataneously, and have done so with previous builds of Code.

Does this issue occur when all extensions are disabled?: No, this issue specifically relates to the interaction between the Python extension, linting, and the pylint and pep8 linter extensions.

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Python linter too slow (#62139)

[wscullen]

Duplicate of this issue:
microsoft/vscode-python#3700

Closing.