Bug 177622 – test262: Unexpected passes after r222617 and r222618

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Ryan Haddad]

After https://trac.webkit.org/changeset/222617, these 14 tests started unexpectedly passing on test262 Release and Debug bots:

test262.yaml/test262/test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setDate/arg-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setDate/arg-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0

https://build.webkit.org/builders/Apple%20El%20Capitan%20Release%20Test262%20%28Tests%29/builds/4434
https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20Test262%20%28Tests%29/builds/3364


After https://trac.webkit.org/changeset/222618, we went down to 8 tests unexpectedly passing on the test262 Debug bot:
test262.yaml/test262/test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setDate/arg-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setDate/arg-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js.default: ERROR: Unexpected exit code: 0
test262.yaml/test262/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js.default-strict: ERROR: Unexpected exit code: 0

https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20Test262%20%28Tests%29/builds/3365

[Radar WebKit Bug Importer]

<rdar://problem/34725960>

[Mark Lam]

Created attachment 322133 [details]
proposed patch.

[Mark Lam]

Thanks for the review.  Landed in r222638: <http://trac.webkit.org/r222638>.