Change Details

``` This PR changes the original size_t sep_pos to std::optional<size_t> sep_post_opt to remove the warning when compiling fuzz tests. ``` Backport of core PR18901. Note that we don't have the warning for some reason.

``` This PR changes the original size_t sep_pos to std::optional<size_t> sep_post_opt to remove the warning when compiling fuzz tests. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/18901 | PR18901]]. Note that we don't have the warning for some reason.

``` This PR changes the original size_t sep_pos to std::optional<size_t> sep_post_opt to remove the warning when compiling fuzz tests. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/18901 | PR18901]]. Note that we don't have the warning for some reason.