Created attachment 373973 [details] test.html STR: See test case. There is a while loop does the following twice. 1) append an element to the host and assign a slot name. The slot name is different on each run. 2) create a named slot and append it to the shadow root. 3) assert that the element created is assigned to the slot. 4) remove the element 5) remove the slot Expected: The element should be assigned to the slot correctly on both run. Actual: On the second run the element is not assigned to the slot.
<rdar://problem/52979943>
Created attachment 373978 [details] test2.html The 2nd named slot is also broken without step 4 and 5.
Created attachment 374018 [details] test3-workaround.html Apparently removing and re-inserting the element can wake it up.
Created attachment 380190 [details] Fixes the bug
Comment on attachment 380190 [details] Fixes the bug Thanks for the reviews!
Comment on attachment 380190 [details] Fixes the bug Clearing flags on attachment: 380190 Committed r250709: <https://trac.webkit.org/changeset/250709>
All reviewed patches have been landed. Closing bug.
*** Bug 196347 has been marked as a duplicate of this bug. ***
*** Bug 204559 has been marked as a duplicate of this bug. ***