---------------NEW FAILING TESTS SUMMARY--------------- FAIL test/built-ins/Promise/prototype/finally/this-value-non-promise.js (default) Full Output: Exception: TypeError: |this| is not a Promise finally@[native code] global code@/Volumes/Data/slave/highsierra-debug-tests-test262/build/JSTests/test262/test/built-ins/Promise/prototype/finally/this-value-non-promise.js:17:31 FAIL test/built-ins/Promise/prototype/finally/this-value-non-promise.js (strict mode) Full Output: Exception: TypeError: |this| is not a Promise finally@[native code] global code@/Volumes/Data/slave/highsierra-debug-tests-test262/build/JSTests/test262/test/built-ins/Promise/prototype/finally/this-value-non-promise.js:18:31 https://build.webkit.org/builders/Apple%20High%20Sierra%20Debug%20Test262%20%28Tests%29/builds/4090
History on the bot suggests that this started with https://trac.webkit.org/changeset/248709/webkit
Reverted the offending change in <https://trac.webkit.org/changeset/248786>
<rdar://problem/54404109>