CASSANDRA-19835 fixes a very small bug but one that has big impact: if you use trie Memtable and unslabbed_heap_buffers_logged Cassandra will crash on boot! If you use any other Memtable type and SAI you will break every SSTable write….
The patch is up now, its a 1 line code change just adding the enum to the switch statement. This was found in CASSANDRA-19833 while making some tests randomize their configs.