Bug 147102 – REGRESSION(r187013): cannot open tddbin.com anymore "quit unexpectedly"

• Component: JavaScriptCore
• Status: VERIFIED FIXED

[Tobias Reiss]

Created attachment 257080 [details]
Crash Report

r187013: "quit unexpectedly - A problem repeatedly occurred with tddbin.com"
r187008: works

I would suspect https://trac.webkit.org/changeset/187012 being the cause because it's a heavy change.
tddbin.com is a "no-install/setup testing environment" from uxebu and it makes use of block scoping, const and let.
Another interesting page in that regard is http://tddbin.com/#?kata=es6/language/block-scoping/const. It offers several use cases to test block-scoping.

[Claude Pache]

Created attachment 257083 [details]
test case: defining strict arrow function (will crash on load)

Minimal testcase: execute the following JS code in order to perform the crash:

() => { 'use strict' }

[Claude Pache]

In fact, my testcase makes r186963 crash, while r186927 works. Either the crash of tddbin.com is unrelated to my testcase, or it was a side-effect of another change in WebKit.

[Claude Pache]

Comment on attachment 257083 [details]
test case: defining strict arrow function (will crash on load)

Filed Bug 147105 for the issue covered by my testcase.

[Claude Pache]

Seems to be fixed in r187018. Can you confirm (and, if yes, close the bug)?

I suspect that it was due to Bug 147105.

[Tobias Reiss]

Yes, you're right Claude. Thanks for investigating!

[Tobias Reiss]

Verified as fixed in latest nightly (r187018)