Iterable may contain generators

[weirdan]

https://psalm.dev/r/fc0010feb2
Expected: no issues, any iterable can be a generator

Introduced in 4c65d3b

Reported in #7596

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/fc0010feb2

<?php

/**
 * @param iterable<int, string> $i
 */
function f(iterable $i): void {
    if ($i instanceof Generator) {}
}

Psalm output (using commit 0e5ad62):

ERROR: TypeDoesNotContainType - 7:9 - Cannot resolve types for $i - iterable<int, string> does not contain Generator