https://bugs.webkit.org/show_bug.cgi?id=197908

console.txt

PS C:\webkit\gb> python ./Tools/Scripts/run-webkit-tests --debug --no-new-test-results --dump-render-tree -v resize-observer
Using port 'win-win10'
Test configuration: <win10, x86, debug>
Placing test results in C:\webkit\gb\WebKitBuild\Debug\bin32\layout-test-results
Using Debug build
Pixel tests disabled
Regular timeout: 30000, slow test timeout: 150000
Command line: C:\webkit\gb\WebKitBuild\Debug\bin32\DumpRenderTree.exe -

--lint-test-files warnings:
LayoutTests\platform\win\TestExpectations:1747 Path does not exist. animations/animation-internals-api.html
LayoutTests\platform\win\TestExpectations:1751 Path does not exist. animations/animation-internals-api-multiple-keyframes.html
LayoutTests\platform\win\TestExpectations:4134 Path does not exist. fast/text/variations/ipc2.html

Found 6 tests; running 6, skipping 0.

Verbose baseline search path: platform\win-win10 -> platform\win -> platform\mac -> generic

Baseline search path: platform\win -> platform\mac -> generic

Running 6 tests

The _NT_SYMBOL_PATH environment variable is not set. Using Microsoft Symbol Server.
Can't find ntsd.exe. Crash logs will not be saved.
'rm' is not recognized as an internal or external command,
operable program or batch file.
Running 1 DumpRenderTree.

[1/6] resize-observer/element-leak-001.html passed
[2/6] resize-observer/element-leak-002.html passed
[3/6] resize-observer/element-leak.html passed
[4/6] resize-observer/modify-frametree-in-callback.html passed
[5/6] resize-observer/multi-frames.html passed
[6/6] resize-observer/observe-element-from-other-frame.html passed

All 6 tests ran as expected.

PS C:\webkit\gb>