Nothing
Related issues: KT-32836, KT-35728
Treating special functions for `if`, `when`, `try`, `?:` as not accepting `Nothing` result type is incorrect. Making so leads to cases with uninferred `Nothing` result type for inner calls and lost data flow info.
#KT-32207 Obsolete #KT-32836 Obsolete #KT-32949 Obsolete #KT-9384 Obsolete