immediate numpy arguments not type checked (python 3.10)

Bug Report

Immediate numpy parameters are not type checked. Consider the following code:

import numpy as np


def do_something_uint8(val: np.typing.NDArray[np.uint8]):
    ...


def do_something_float(val: np.typing.NDArray[np.float32]):
    ...

def scalar_int(val: int):
    ...


scalar_int(3.0)  # correctly shows mypy error here

np_u8 = np.random.rand(3, 4).astype(np.uint8)
np_f = np.random.rand(3, 4).astype(np.float32)

do_something_uint8(np_f)  # correctly shows mypy error
do_something_float(np_f)

do_something_uint8(np_u8)
do_something_float(np_u8)  # correctly shows mypy error

do_something_uint8(np.random.rand(3, 4).astype(np.float32))  # does NOT show mypy error here

Look at the last line. This should show a mypy error (similar to the scalar_int case), since we are passing in a numpy with dtype float32. But it does not. If we first assign to a variable, then the type check works ok.

Expected Behavior

The last line of the code above should show a mypy error, because we are trying to pass in a numpy array with dtype float32, into a function that only accepts numpy array of dtype uint8.

Actual Behavior

The last line of the code above passes mypy checking.

Your Environment

$ python -V
Python 3.10.7
$ pip freeze |  grep mypy
mypy==0.991
mypy-extensions==0.4.3
$ uname -a
Darwin Hughs-MacBook-Air.local 21.6.0 Darwin Kernel Version 21.6.0: Thu Sep 29 20:11:33 PDT 2022; root:xnu-8020.240.7~1/RELEASE_ARM64_T8110 arm64

[mypy]
ignore_missing_imports = True

No mypy command-line flags.

Inizia riproducendo la chiamata diretta finale a NumPy e le chiamate equivalenti basate su variabili con mypy 0.991 in Python 3.10. Traccia come vengono inferiti gli argomenti delle chiamate immediate e verificati rispetto al dtype annotato di NDArray; il lavoro è completato quando la chiamata diretta da float32 a uint8 segnala un errore in modo coerente con il caso della variabile assegnata.