Bug 1928137 [wpt PR 48886] - Prevent infinite loop in nested customiz…

…able selects, a=testonly

Automatic update from web-platform-tests
Prevent infinite loop in nested customizable selects

Nesting selects with <selectedoption> elements can lead to infinite
cloning. By preventing the nested select's <selectedoption> from doing
any cloning, the infinite loop is fixed.

Fixed: 373893049
Change-Id: I9c493be5dfc1dd51c3d3aa2e10ee2a1d2f27d071
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5939531
Reviewed-by: Traian Captan <tcaptanchromium.org>
Commit-Queue: Joey Arhar <jarharchromium.org>
Cr-Commit-Position: refs/heads/main{#1375888}

--

wpt-commits: c332da54a2e24b488c538cfd5b036763304bb1fc
wpt-pr: 48886

UltraBlame original commit: 2340441d4d5d7ea1a96dc5a2a54562c2a9f114d4

testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/nested-select-crash.html

@@ -0,0 +1,153 @@
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