128283 2014-02-05 16:52:08 -0800 REGRESSION (r163262?): transitions/shorthand-border-transitions.html flakily asserts 2017-03-06 14:16:46 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified ASSIGNED https://bugs.webkit.org/show_bug.cgi?id=128395 Regression P2 Normal --- 1 ap zalan mcatanzaro zalan oldest_to_newest 977141 0 ap 2014-02-05 16:52:08 -0800 transitions/shorthand-border-transitions.html has started to flakily assert on WebKit2 debug testers: ASSERTION FAILED: !rect.isEmpty() Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x00000001106fd90a WTFCrash + 42 (Assertions.cpp:333) 1 com.apple.WebCore 0x000000011209d410 WebCore::GraphicsContext::drawRect(WebCore::FloatRect const&) + 128 (GraphicsContextCG.cpp:293) 2 com.apple.WebCore 0x0000000112e8b0a1 WebCore::RenderObject::drawLineForBoxSide(WebCore::GraphicsContext*, WebCore::LayoutUnit, WebCore::LayoutUnit, WebCore::LayoutUnit, WebCore::LayoutUnit, WebCore::BoxSide, WebCore::Color, WebCore::EBorderStyle, int, int, bool) + 16193 (RenderObject.cpp:937) 3 com.apple.WebCore 0x0000000112d58723 WebCore::RenderBoxModelObject::paintOneBorderSide(WebCore::GraphicsContext*, WebCore::RenderStyle const*, WebCore::RoundedRect const&, WebCore::RoundedRect const&, WebCore::LayoutRect const&, WebCore::BoxSide, WebCore::BoxSide, WebCore::BoxSide, WebCore::BorderEdge const*, WebCore::Path const*, WebCore::BackgroundBleedAvoidance, bool, bool, bool, WebCore::Color const*) + 2419 (RenderBoxModelObject.cpp:1695) A lot of similar assertions were introduced in r163262 and fixed in r163264, but this one is still happening. The first occurrence was on r163263, and it happens about 1 time out of 10. 977142 1 ap 2014-02-05 16:52:26 -0800 This is readily reproducible locally. 977160 2 zalan 2014-02-05 17:30:41 -0800 I tried to repro it a few times with no success...I'll try again. 977252 3 ap 2014-02-05 22:38:45 -0800 I was simply running this command, and could reproduce two times out of three: run-webkit-tests -2 transitions/shorthand-border-transitions.html Should probably be easier to reproduce with "--iterations 100". 979781 4 ap 2014-02-11 23:01:34 -0800 Skipped the test in debug builds in <http://trac.webkit.org/r163951>. 1283947 5 mcatanzaro 2017-03-06 14:16:46 -0800 Probably a dup of bug #128395?