Occurrence in lambda capture initializer not highlighted

[HighCommander4]

In the following code:

void foo() {
  int waldo = 42;
  waldo = waldo + 1;
  auto lambda = [x = waldo](){};
}

If you click on the declaration of waldo, the two occurrences on the next line are highlighted (via textDocument/documentHighlight), but the occurrence in the lambda capture initializer is not.

[HighCommander4]

Proposed fix