The following tests imported on bug 205872 crash on Debug builds: imported/w3c/web-platform-tests/css/css-backgrounds/background-size/vector/tall--auto-32px--nonpercent-width-omitted-height-viewbox.html imported/w3c/web-platform-tests/css/css-backgrounds/background-size/vector/tall--auto-32px--nonpercent-width-percent-height.html imported/w3c/web-platform-tests/css/css-backgrounds/background-size/vector/tall--auto-32px--nonpercent-width-percent-height-viewbox.html imported/w3c/web-platform-tests/css/css-backgrounds/background-size/vector/tall--auto-32px--nonpercent-width-omitted-height.html Results page: https://build.webkit.org/results/Apple-Catalina-Debug-WK2-Tests/r255241%20(1971)/results.html Se also bug 206578 and bug 206579 for related crashes on Debug
<rdar://problem/121075173>