Unused value

An assigned value that is never used may represent unnecessary computation, an incorrect algorithm, or possibly the need for cleanup or refactoring. A value assigned to a variable is never used.
/src/block_cache/block_mgr.c:951: UNUSED_VALUE 138594 Overwriting previous write to "bm->switch_object" with value from "__bm_switch_object_end_readonly".
/src/block_cache/block_mgr.c:950: UNUSED_VALUE 138594 Assigning value from "__bm_switch_object_readonly" to "bm->switch_object" here, but that stored value is overwritten before it can be used.