The current version of the toolkit advertises the support for ES6 proxying without being able to fully support it.
This causes failures on complex web-sites such as those of Slack.com, breaking both the net-im/diligent we already have in the tree and the net-im/py-scudcloud I'd like to add. See:
The patch offered by the maintainer of the webkit fork we use helps solve the problem:
The actual patch we need is in the comment right after the above, the rest of the author's change cleans up the tests we do not use.
Created attachment 187999 [details]
Could you confirm whether this is solves the problem for you?
Comment on attachment 187999 [details]
> Could you confirm whether this is solves the problem for you?
Yes, it seems like a faithful replication of the patch I linked to. Thanks!
A commit references this bug:
Date: Tue Nov 14 19:31:22 UTC 2017
New revision: 454197
www/qt5-webkit add upstream patch to disable broken ES6 proxy support
Submitted by: Mikhail T. <mi@ALDAN.algebra.com>