Chained assignment should be an error/warning

[Kajiih]

At the moment, we can write

$env.foo = $env.bar = "baz"

and even

let $foo = let $bar = "baz"

without any warning, but the resulting values are

$env.foo == null
$env.bar == "baz"

which is most likely not what was expected.

I think this should be reported as a warning (or even an error if there are no actual use cases for this syntax).

[fdncred]

Agreed, but that is probably a nushell problem vs a extension problem. All the diagnostics are generated from nushell.

[Kajiih]

Related feature request: https://github.com/nushell/nushell/issues/15883