Variable in for-in loop can’t be renamed using rename refactor

[stereotype441]

Given the following code:

f(List<int> ints) {
  for (var value in ints) { // (1)
    print(value);
  }
}

Place the cursor on the identifier value on the line marked (1), and request a rename refactor.

Expected result: it should be possible to rename this variable.

Observed result: the IDE shows the message "The element can't be renamed."

I see similar behaviour with for-in collection elements, e.g.:

f(List<int> ints) => [for (var value in ints) value * 2];

Reproduced in 60fec9c.

[scheglov]

https://dart-review.googlesource.com/c/sdk/+/297900

This looks to be an LSP specific issue.
IntelliJ does not call the server at all 😨