The error is:
dead_error_condition: The switch governing value op_type cannot be _OPERATION_TYPE_COUNT.
CID 114074 (#1 of 1): Logically dead code (DEADCODE)dead_error_begin: Execution cannot reach this statement: case _OPERATION_TYPE_COUNT:.
WT-5733 tried to address an issue raised by Coverity:
Despite of the changes, Coverity still complains. Using the if/else if/etc approach should fix the issue for good.