Anyone fixing TestNSJSONSerialization?

Is anyone looking at this failure that’s blocking CI?

https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/

TestFoundation/TestNSJSONSerialization.swift:301: error: TestNSJSONSerialization.test_deserialize_unicodeEscapeSequence : XCTAssertEqual failed: ("Optional("✨")") is not equal to ("Optional("Optional(\"\\u{2728}\")")") -

After
[stdlib] Rename flatten() to joined() (SE-0133) — jacob <https://ci.swift.org/user/jacob/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail0&gt;
Add benchmark for iterating Data — kevin.ballard <https://ci.swift.org/user/kevin.ballard/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail1&gt;
Implement a custom Data.Iterator — kevin.ballard <https://ci.swift.org/user/kevin.ballard/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail2&gt;
[stdlib] Update doc comments for SE-0133 — jacob <https://ci.swift.org/user/jacob/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail3&gt;
[stdlib][SE-0089] Finish off Lossless String Conversion (#3761) — kremenek <https://ci.swift.org/user/kremenek/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail4&gt;
Cleanup validation tests after SE-0089 — devteam.codafi <https://ci.swift.org/user/devteam.codafi/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail5&gt;
vim: add support for 'fileprivate' — gribozavr <https://ci.swift.org/user/gribozavr/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail6&gt;
Revert "Implement a custom Data.Iterator" (#3848) — github <https://ci.swift.org/user/github/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail7&gt;
Keep cleaning up — devteam.codafi <https://ci.swift.org/user/devteam.codafi/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail8&gt;
Updates for SE-0089 — devteam.codafi <https://ci.swift.org/user/devteam.codafi/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail9&gt;
Updates for SE-0089 — devteam.codafi <https://ci.swift.org/user/devteam.codafi/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail10&gt;
Minor update for SE-0089 — devteam.codafi <https://ci.swift.org/user/devteam.codafi/&gt; / detail <https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/6576/changes#detail11&gt;