Slow compilation for large pattern matching switch

[kevinychen]

What happened?

Similar to #2328. This code snippet takes a very long time to compile (and so does the code snippet in the previous issue):

String id(Parent parent) {
    return switch (parent) {
        case Child1 child -> child.id();
        case Child2 child -> child.id();
        case Child3 child -> child.id();
        case Child4 child -> child.id();
        case Child5 child -> child.id();
        case Child6 child -> child.id();
        case Child7 child -> child.id();
        case Child8 child -> child.id();
    };
}

The 7-branch case only takes ~3s for me, but the 8-branch case takes ~20s, the 9-branch case takes ~3m, growing exponentially.

What did you want to happen?

This should take very little time.

Other notes

Just like #2328, this looks to also be due to the SafeLoggingPropagation check: each pattern matching variable child is considered a captured reference and recursively triggers an analysis here.