There was a bug discovered by the addition of D4255 affecting ASAN
builds. See core issue:
https://github.com/bitcoin/bitcoin/issues/14163. The exact solution
for this bug is unclear, but will likely require the backporting of at
least the following PRs and their dependencies from Core:
https://github.com/bitcoin/bitcoin/pull/13161/
https://github.com/bitcoin/bitcoin/pull/12493/
https://github.com/bitcoin/bitcoin/pull/14320/
https://github.com/bitcoin/bitcoin/pull/14552/
https://github.com/bitcoin/bitcoin/pull/14760/
https://github.com/bitcoin/bitcoin/pull/11911/
Suppression of the error is a temporary fix until the above backports
are complete. This is the same approach that Core took. See
https://github.com/bitcoin/bitcoin/pull/14794/files#diff-354f30a63fb0907d4ad57269548329e3R111
for the initial suppression and
https://github.com/bitcoin/bitcoin/pull/15303/files#diff-354f30a63fb0907d4ad57269548329e3L128
for its removal.