Logically dead code

The indicated dead code may have performed some action; that action will never occur. Code can never be reached because of a logical contradiction
/src/mongo/db/exec/sbe/parser/parser.cpp:1128: DEADCODE 117933 Assigning: "foldPos" = "4UL".
/src/mongo/db/exec/sbe/parser/parser.cpp:1133: DEADCODE 117933 Assigning: "foldPos" = "3UL".
/src/mongo/db/exec/sbe/parser/parser.cpp:1145: DEADCODE 117933 At condition "foldPos", the value of "foldPos" must be between 3 and 4.
/src/mongo/db/exec/sbe/parser/parser.cpp:1138: DEADCODE 117933 The condition "foldPos" must be true.
/src/mongo/db/exec/sbe/parser/parser.cpp:1138: DEADCODE 117933 Execution cannot reach this statement: "<temporary>.unique_ptr(std:...".