MyPy linting output not being shown in Problems tab

[AllanDaemon]

Environment data

• VS Code version:
  • Version: 1.25.1
  • Commit: 1dfc5e557209371715f655691b1235b6b26a06be
  • Date: 2018-07-11T15:40:20.190Z
  • Electron: 1.7.12
  • Chrome: 58.0.3029.110
  • Node.js: 7.9.0
  • V8: 5.8.283.38
  • Architecture: x64
• Extension version:
  • Python (ms-python.python) 2018.7.1
  • MagicPython 1.0.12
• OS and version: Fedora 28 (Linux 4.16.14-300.fc28.x86_64 1228 multi root master #1 SMP)
• Python version: python3.7 (from fedora package python37)
• Type of virtual environment used: N/A
• Relevant/affected Python packages and their versions: mypy 0.620

Actual behavior

mypy and pylint are executed and show errors on the output/python tab, but just the pylint errors are shown on the problems tab.

Expected behavior

problems tab shows both pylint and mypy errors

Steps to reproduce:

1. Install Python 3.7 (dnf install python37 on Fedora)
2. Install pip on python3.7
3. sudo python3.7 -m pip install --pre -U mypy pylint

Logs

Code for test
UPDATE: save file as name.pyi

#!/usr/bin/env python3.7
from __future__ import annotations

a:int = "a"
not_declared_var

##########Linting Output - mypy##########
mypy /home/rea/code/rfs/provider.pyi
provider.pyi:10: error: Incompatible types in assignment (expression has type "str", variable has type "int")
provider.pyi:11: error: Name 'not_declared_var' is not defined
##########Linting Output - pylint##########
************* Module provider
11,0,error,E0602:Undefined variable 'not_declared_var'

------------------------------------------------------------------
Your code has been rated at 0.00/10 (previous run: 0.00/10, +0.00)

Show on problem tab:

E0602:Undefined variable 'not_declared_var'

Output from Console under the Developer Tools panel

workbench.main.js:sourcemap:4103 Overwriting grammar scope name to file mapping for scope source.python.
Old grammar file: file:///usr/share/code/resources/app/extensions/python/syntaxes/MagicPython.tmLanguage.json.
New grammar file: file:///home/rea/.vscode/extensions/magicstack.magicpython-1.0.12/grammars/MagicPython.tmLanguage

My config (relevant parts):
User

{
    "python.globalModuleInstallation": true,
    "python.pythonPath": "/usr/bin/python3",
    "files.exclude": {
        "**/__pycache__": true,
        "**/db.sqlite3": true,
    },
    "terminal.integrated.shell.linux": "/bin/shell",
    "files.autoSave": "off",
    "python.linting.pylintPath": "/usr/local/bin/pylint",
    "python.analysis.typeshedPaths": [ "/usr/share/typeshed/"],
    "python.autoComplete.typeshedPaths": [
        "/usr/share/typeshed/"
    ],
}

Workspace

{
	"folders": [
		{
			"path": ".."
		}
	],
	"settings": {  "files.exclude": {
		"**/.git": true,
		"**/.svn": true,
		"**/.hg": true,
		"**/CVS": true,
		"**/.DS_Store": true,
		".gitignore": true,
	},
	"python.pythonPath": "/usr/bin/python3.7",
	"python.linting.pylintPath": "/usr/local/bin/pylint3.7",
	"python.linting.mypyEnabled": true,
	"python.linting.mypyPath": "/usr/bin/mypy3.7",
	"python.linting.mypyArgs": [],
}
}

content of /usr/bin/mypy3.7:

#!/bin/sh
exec python3.7 -m mypy --python-version 3.7 $@

I've looked in #343 and #1440 also, but no luck.

[brettcannon]

I can't replicate:

def spam(x: int) -> str:
    return 3.14

x =

Leads to both mypy and pylint reporting a syntax error:

Removing the syntax error shows mypy results:

It also works with your sample:

My suspicion is that you might have a mis-configuration with mypy or you need to update your version.

[AllanDaemon]

I found the issue: The MyPy linter module expects the file always to have a .py extension and I am editing an .pyi file.