Heads up: we have a critical regression in the parser in 1.5.0.
https://youtrack.jetbrains.com/issue/KT-46455 OOM on parsing invalid code with string interpolation.
It can lock up IDEA and eat all memory, so the process has to be killed manually. It can happen during typing inside a function with a string interpolation expression, when the code is in inconsistent state (parser should report an error).