In order to replicate the bug that halts IntelliJ:

1. Install IntelliJ IDEA 2020
2. Use kotlin plugin 1.3.71 or better
3. Open BugHere.kt
4. Remove the two typecasts (as MetricInfoTable<*>) - shown below
5. Trigger autocomplete of some sort

val table: MetricInfoTable<*> = when (type) {
    MetricSource.CUSTOM -> CustomMetricInfoTable.CUSTOM_METRIC_INFO
    MetricSource.DEFAULT -> DefaultMetricInfoTable.DEFAULT_METRIC_INFO
}