Bug 151105 – ASSERTION FAILED: totalFlexGrow >= 0

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: CSS

[Renata Hodovan]

Created attachment 265189 [details]
Test

Load the attached test with debug MiniBrowser:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
<style>
* {
    display: inline-flex;
    overflow-x: scroll;width: 68%;
}
</style>
<ins>
    <h1></h1>aaaaaaaaaaaaaaaa
</ins>


OS: Ubuntu 15.04 x86_64
Checked build: debug EFL
Checked version: 29ae33c


Backtrace:

ASSERTION FAILED: totalFlexGrow >= 0 && totalWeightedFlexShrink >= 0
../../Source/WebCore/rendering/RenderFlexibleBox.cpp(701) : void WebCore::RenderFlexibleBox::layoutFlexItems(bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext>&)
1   0x7fe2811f589f WTFCrash
2   0x7fe287bae687 WebCore::RenderFlexibleBox::layoutFlexItems(bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext, 0ul, WTF::CrashOnOverflow, 16ul>&)
3   0x7fe287bac85f WebCore::RenderFlexibleBox::layoutBlock(bool, WebCore::LayoutUnit)
4   0x7fe287ae9558 WebCore::RenderBlock::layout()
5   0x7fe287abcaf5 WebCore::RenderElement::layoutIfNeeded()
6   0x7fe287bb0eec WebCore::RenderFlexibleBox::layoutAndPlaceChildren(WebCore::LayoutUnit&, WTF::Vector<WebCore::RenderBox*, 0ul, WTF::CrashOnOverflow, 16ul> const&, WTF::Vector<WebCore::LayoutUnit, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::LayoutUnit, bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext, 0ul, WTF::CrashOnOverflow, 16ul>&)
7   0x7fe287bae73e WebCore::RenderFlexibleBox::layoutFlexItems(bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext, 0ul, WTF::CrashOnOverflow, 16ul>&)
8   0x7fe287bac85f WebCore::RenderFlexibleBox::layoutBlock(bool, WebCore::LayoutUnit)
9   0x7fe287ae9558 WebCore::RenderBlock::layout()
10  0x7fe287abcaf5 WebCore::RenderElement::layoutIfNeeded()
11  0x7fe287bb0eec WebCore::RenderFlexibleBox::layoutAndPlaceChildren(WebCore::LayoutUnit&, WTF::Vector<WebCore::RenderBox*, 0ul, WTF::CrashOnOverflow, 16ul> const&, WTF::Vector<WebCore::LayoutUnit, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::LayoutUnit, bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext, 0ul, WTF::CrashOnOverflow, 16ul>&)
12  0x7fe287bae73e WebCore::RenderFlexibleBox::layoutFlexItems(bool, WTF::Vector<WebCore::RenderFlexibleBox::LineContext, 0ul, WTF::CrashOnOverflow, 16ul>&)
13  0x7fe287bac85f WebCore::RenderFlexibleBox::layoutBlock(bool, WebCore::LayoutUnit)
14  0x7fe287ae9558 WebCore::RenderBlock::layout()
15  0x7fe287b17e20 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&)
16  0x7fe287b1795f WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&)
17  0x7fe287b16dc3 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
18  0x7fe287ae9558 WebCore::RenderBlock::layout()
19  0x7fe287cfbfa7 WebCore::RenderView::layoutContent(WebCore::LayoutState const&)
20  0x7fe287cfc69a WebCore::RenderView::layout()
21  0x7fe2878ce7f6 WebCore::FrameView::layout(bool)
22  0x7fe28732bf3c WebCore::Document::implicitClose()
23  0x7fe287791827 WebCore::FrameLoader::checkCallImplicitClose()
24  0x7fe28779155e WebCore::FrameLoader::checkCompleted()
25  0x7fe2877912ce WebCore::FrameLoader::finishedParsing()
26  0x7fe287335f6c WebCore::Document::finishedParsing()
27  0x7fe2886a1349 WebCore::HTMLConstructionSite::finishedParsing()
28  0x7fe28768a064 WebCore::HTMLTreeBuilder::finished()
29  0x7fe28765a708 WebCore::HTMLDocumentParser::end()
30  0x7fe28765a7e1 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
31  0x7fe2876594c3 WebCore::HTMLDocumentParser::prepareToStopParsing()
Aborted (core dumped)

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fe2811f58a4 in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
321     *(int *)(uintptr_t)0xbbadbeef = 0;
#0  0x00007fe2811f58a4 in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
#1  0x00007fe287bae687 in WebCore::RenderFlexibleBox::layoutFlexItems (this=0x7fe2687d0708, relayoutChildren=true, lineContexts=...) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:701
#2  0x00007fe287bac85f in WebCore::RenderFlexibleBox::layoutBlock (this=0x7fe2687d0708, relayoutChildren=true) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:272
#3  0x00007fe287ae9558 in WebCore::RenderBlock::layout (this=0x7fe2687d0708) at ../../Source/WebCore/rendering/RenderBlock.cpp:931
#4  0x00007fe287abcaf5 in WebCore::RenderElement::layoutIfNeeded (this=0x7fe2687d0708) at ../../Source/WebCore/rendering/RenderElement.h:135
#5  0x00007fe287bb0eec in WebCore::RenderFlexibleBox::layoutAndPlaceChildren (this=0x7fe2687d0320, crossAxisOffset=..., children=..., childSizes=..., availableFreeSpace=..., relayoutChildren=true, lineContexts=...) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:1128
#6  0x00007fe287bae73e in WebCore::RenderFlexibleBox::layoutFlexItems (this=0x7fe2687d0320, relayoutChildren=true, lineContexts=...) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:705
#7  0x00007fe287bac85f in WebCore::RenderFlexibleBox::layoutBlock (this=0x7fe2687d0320, relayoutChildren=true) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:272
#8  0x00007fe287ae9558 in WebCore::RenderBlock::layout (this=0x7fe2687d0320) at ../../Source/WebCore/rendering/RenderBlock.cpp:931
#9  0x00007fe287abcaf5 in WebCore::RenderElement::layoutIfNeeded (this=0x7fe2687d0320) at ../../Source/WebCore/rendering/RenderElement.h:135
#10 0x00007fe287bb0eec in WebCore::RenderFlexibleBox::layoutAndPlaceChildren (this=0x7fe2687d0190, crossAxisOffset=..., children=..., childSizes=..., availableFreeSpace=..., relayoutChildren=true, lineContexts=...) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:1128
#11 0x00007fe287bae73e in WebCore::RenderFlexibleBox::layoutFlexItems (this=0x7fe2687d0190, relayoutChildren=true, lineContexts=...) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:705
#12 0x00007fe287bac85f in WebCore::RenderFlexibleBox::layoutBlock (this=0x7fe2687d0190, relayoutChildren=true) at ../../Source/WebCore/rendering/RenderFlexibleBox.cpp:272
#13 0x00007fe287ae9558 in WebCore::RenderBlock::layout (this=0x7fe2687d0190) at ../../Source/WebCore/rendering/RenderBlock.cpp:931
#14 0x00007fe287b17e20 in WebCore::RenderBlockFlow::layoutBlockChild (this=0x7fe2686dd228, child=..., marginInfo=..., previousFloatLogicalBottom=..., maxFloatLogicalBottom=...) at ../../Source/WebCore/rendering/RenderBlockFlow.cpp:709
#15 0x00007fe287b1795f in WebCore::RenderBlockFlow::layoutBlockChildren (this=0x7fe2686dd228, relayoutChildren=true, maxFloatLogicalBottom=...) at ../../Source/WebCore/rendering/RenderBlockFlow.cpp:632
#16 0x00007fe287b16dc3 in WebCore::RenderBlockFlow::layoutBlock (this=0x7fe2686dd228, relayoutChildren=true, pageLogicalHeight=...) at ../../Source/WebCore/rendering/RenderBlockFlow.cpp:485
#17 0x00007fe287ae9558 in WebCore::RenderBlock::layout (this=0x7fe2686dd228) at ../../Source/WebCore/rendering/RenderBlock.cpp:931
#18 0x00007fe287cfbfa7 in WebCore::RenderView::layoutContent (this=0x7fe2686dd228, state=...) at ../../Source/WebCore/rendering/RenderView.cpp:253
#19 0x00007fe287cfc69a in WebCore::RenderView::layout (this=0x7fe2686dd228) at ../../Source/WebCore/rendering/RenderView.cpp:378
#20 0x00007fe2878ce7f6 in WebCore::FrameView::layout (this=0x7fe268425540, allowSubtree=true) at ../../Source/WebCore/page/FrameView.cpp:1408
#21 0x00007fe28732bf3c in WebCore::Document::implicitClose (this=0x7fe268426a40) at ../../Source/WebCore/dom/Document.cpp:2704
#22 0x00007fe287791827 in WebCore::FrameLoader::checkCallImplicitClose (this=0x7fe2686e4098) at ../../Source/WebCore/loader/FrameLoader.cpp:889
#23 0x00007fe28779155e in WebCore::FrameLoader::checkCompleted (this=0x7fe2686e4098) at ../../Source/WebCore/loader/FrameLoader.cpp:835
#24 0x00007fe2877912ce in WebCore::FrameLoader::finishedParsing (this=0x7fe2686e4098) at ../../Source/WebCore/loader/FrameLoader.cpp:756
#25 0x00007fe287335f6c in WebCore::Document::finishedParsing (this=0x7fe268426a40) at ../../Source/WebCore/dom/Document.cpp:4897
#26 0x00007fe2886a1349 in WebCore::HTMLConstructionSite::finishedParsing (this=0x7fe2686fe6e0) at ../../Source/WebCore/html/parser/HTMLConstructionSite.cpp:403
#27 0x00007fe28768a064 in WebCore::HTMLTreeBuilder::finished (this=0x7fe2686fe6c0) at ../../Source/WebCore/html/parser/HTMLTreeBuilder.cpp:2937
#28 0x00007fe28765a708 in WebCore::HTMLDocumentParser::end (this=0x7fe26842e840) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:393
#29 0x00007fe28765a7e1 in WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd (this=0x7fe26842e840) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:402
#30 0x00007fe2876594c3 in WebCore::HTMLDocumentParser::prepareToStopParsing (this=0x7fe26842e840) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:132
#31 0x00007fe28765a824 in WebCore::HTMLDocumentParser::attemptToEnd (this=0x7fe26842e840) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:414
#32 0x00007fe28765a8db in WebCore::HTMLDocumentParser::finish (this=0x7fe26842e840) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:442
#33 0x00007fe28777c702 in WebCore::DocumentWriter::end (this=0x7fe2684249e0) at ../../Source/WebCore/loader/DocumentWriter.cpp:247
#34 0x00007fe287765fd8 in WebCore::DocumentLoader::finishedLoading (this=0x7fe268424940, finishTime=0) at ../../Source/WebCore/loader/DocumentLoader.cpp:437
#35 0x00007fe287765d36 in WebCore::DocumentLoader::notifyFinished (this=0x7fe268424940, resource=0x7fe268436000) at ../../Source/WebCore/loader/DocumentLoader.cpp:384
#36 0x00007fe287811143 in WebCore::CachedResource::checkNotify (this=0x7fe268436000) at ../../Source/WebCore/loader/cache/CachedResource.cpp:297
#37 0x00007fe287811252 in WebCore::CachedResource::finishLoading (this=0x7fe268436000) at ../../Source/WebCore/loader/cache/CachedResource.cpp:313
#38 0x00007fe28780d446 in WebCore::CachedRawResource::finishLoading (this=0x7fe268436000, data=0x7fe2687bb680) at ../../Source/WebCore/loader/cache/CachedRawResource.cpp:103
#39 0x00007fe2877d5e74 in WebCore::SubresourceLoader::didFinishLoading (this=0x7fe26842fa80, finishTime=0) at ../../Source/WebCore/loader/SubresourceLoader.cpp:372
#40 0x00007fe2877d0953 in WebCore::ResourceLoader::didFinishLoading (this=0x7fe26842fa80, finishTime=0) at ../../Source/WebCore/loader/ResourceLoader.cpp:638
#41 0x00007fe287fc419a in WebCore::readCallback (asyncResult=0x1e949d0, data=0x7fe2687bd680) at ../../Source/WebCore/platform/network/soup/ResourceHandleSoup.cpp:1341
#42 0x00007fe27d7e55a6 in async_ready_callback_wrapper (source_object=0x1ddc9b0, res=0x1e949d0, user_data=0x7fe2687bd680) at ginputstream.c:523
#43 0x00007fe27d80bb74 in g_task_return_now (task=0x1e949d0) at gtask.c:1077
#44 0x00007fe27d80bb99 in complete_in_idle_cb (task=0x1e949d0) at gtask.c:1086
#45 0x00007fe27d243add in g_main_dispatch (context=0x1dd6bd0) at gmain.c:3064
#46 g_main_context_dispatch (context=context@entry=0x1dd6bd0) at gmain.c:3663
#47 0x00007fe27ebafe58 in _ecore_glib_select__locked (ecore_timeout=<optimized out>, efds=0x7ffe939e3e60, wfds=0x7ffe939e3de0, rfds=0x7ffe939e3d60, ecore_fds=<optimized out>, ctx=<optimized out>) at lib/ecore/ecore_glib.c:172
#48 _ecore_glib_select (ecore_fds=<optimized out>, rfds=0x7ffe939e3d60, wfds=0x7ffe939e3de0, efds=0x7ffe939e3e60, ecore_timeout=<optimized out>) at lib/ecore/ecore_glib.c:204
#49 0x00007fe27ebb34a4 in _ecore_main_select (timeout=9.532824124368238e-130) at lib/ecore/ecore_main.c:1459
#50 0x00007fe27ebb3ed4 in _ecore_main_loop_iterate_internal (once_only=once_only@entry=0) at lib/ecore/ecore_main.c:1893
#51 0x00007fe27ebb3fc7 in ecore_main_loop_begin () at lib/ecore/ecore_main.c:983
#52 0x00007fe281250795 in WTF::RunLoop::run () at ../../Source/WTF/wtf/efl/RunLoopEfl.cpp:49
#53 0x00007fe2870b087d in WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebProcessMain> (argc=2, argv=0x7ffe939e4298) at ../../Source/WebKit2/Shared/unix/ChildProcessMain.h:61
#54 0x00007fe2870b048b in WebKit::WebProcessMainUnix (argc=2, argv=0x7ffe939e4298) at ../../Source/WebKit2/WebProcess/efl/WebProcessMainEfl.cpp:161
#55 0x00000000004008ea in main (argc=2, argv=0x7ffe939e4298) at ../../Source/WebKit2/WebProcess/EntryPoint/unix/WebProcessMain.cpp:44

[Brent Fulgham]

This does not reproduce under r204037. If you believe there is still an issue, please reopen the bug with a revised test case.

[Renata Hodovan]

Using the attached test case the issue is still seems valid in r204165 with debug EFL and GTK builds.

[Renata Hodovan]

I can repro on Mac too with r212361.

[Frédéric Wang (:fredw)]

@Renata: I'm not able to reproduce the issue. I tried with debug build of WebKitGTK (r224920) and macOS (r224757).

[Renata Hodovan]

(In reply to Frédéric Wang (:fredw) from comment #4)
> @Renata: I'm not able to reproduce the issue. I tried with debug build of
> WebKitGTK (r224920) and macOS (r224757).

@Frédéric: Indeed, the issue is quite old (the assertion doesn't even exist in this form). However, I have a repro that triggers the new assertion check both with WebKitGTK (r224529) and macOS (r225029): 

ASSERTION FAILED: totalFlexGrow >= 0
../../Source/WebCore/rendering/RenderFlexibleBox.cpp(888) : void WebCore::RenderFlexibleBox::layoutFlexItems(bool)

Test case:

<style>
metadata {
    flex-grow: 615112881120490770;
}

tspan {
    display: flex
}

* { 
    flex-grow: 27306422;
    margin: 018ch;
    display: inline-grid,
    overflow-y: overlay
}
</style>
<tspan>
    <metadata>a</metadata>
    <div>a</div>
</tspan>


Could you verify it, please?

[Frédéric Wang (:fredw)]

Created attachment 327394 [details]
testcase

[Frédéric Wang (:fredw)]

Thanks for the new testcase. I can confirm it allows to hit the ASSERT on macOS and GTK.

[Brent Fulgham]

This code has been significantly refactored since this patch was proposed. There doesn't seem to be any action we can take here.