Incorrect error message for an invalid usage of the walrus operator in a nested comprehension

[MetRonnie]

Describe the bug
Incorrect error message for an invalid usage of the walrus operator in a nested comprehension.

Code or Screenshots
If possible, provide a minimal, self-contained code sample (surrounded by triple back ticks) to demonstrate the issue. The code should define or import all referenced symbols.

print([
    f"{i=}"
    for i in [
        x
        for j in range(10)
        if (x := j * 2) % 3 == 0
    ]
])

Pylance gives:

Operator ":=" is not allowed in this context without surrounding parentheses

Note the expression is already surrounded by parentheses.

Whereas running the code gives:

SyntaxError: assignment expression cannot be used in a comprehension iterable expression

VS Code extension or command-line

VS Code:

Client: Pylance client (2026.2.1) started with python extension (2026.4.0)
Pylance language server 2026.2.1 (pyright version 1.1.408, commit 138238b4)