MyPy yield a false error with function(*args, x)

Bug Report

MyPy wrongly produce an error for "Too many argument" when calling a function with star syntax followed by an additional argument.

To Reproduce

def foo(a: int, b: int, c: int, d: int) -> None:
    return None

lst = [1, 2, 3]
foo(*lst, 4)

Expected Behavior
MyPy should not yield any error, and the types are fit.

Actual Behavior
An error occurs:

mypy_reproduce.py:6: error: Too many arguments for "foo"  [call-arg]

Your Environment

• Mypy version used:1.4.1
• Mypy command-line flags: No flags
• Mypy configuration options from mypy.ini (and other config files): No config
• Python version used: 3.7.3

Start with the provided Python reproducer and inspect mypy's argument-checking path for calls combining starred arguments with a following positional argument. Compare the reported result with the expected acceptance of foo(*lst, 4), and verify that the false "Too many arguments" error is no longer produced.