Closed Bug 1649563 Opened 4 years ago Closed 3 years ago

Assertion failure: !childNIF || mFrames.ContainsFrame(childNIF) || (pifEOC && pifEOC->ContainsFrame(childNIF)) || (oc && oc->ContainsFrame(childNIF)) || (eoc && eoc->ContainsFrame(childNIF)), at src/layout/generic/nsContainerFrame.cpp:3151

Categories

(Core :: Layout: Flexbox, defect)

defect

Tracking

()

RESOLVED WORKSFORME
Tracking Status
firefox79 --- affected
firefox80 --- affected

People

(Reporter: tsmith, Unassigned)

References

(Blocks 1 open bug, Regression)

Details

(Keywords: assertion, regression, testcase, Whiteboard: [bugmon:bisected,confirmed])

Attachments

(1 file)

Attached file testcase.html (deleted) —

Assertion failure: !childNIF || mFrames.ContainsFrame(childNIF) || (pifEOC && pifEOC->ContainsFrame(childNIF)) || (oc && oc->ContainsFrame(childNIF)) || (eoc && eoc->ContainsFrame(childNIF)), at src/layout/generic/nsContainerFrame.cpp:3151

0|0|libxul.so|nsContainerFrame::SanityCheckChildListsBeforeReflow() const|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|3148|0x0
0|1|libxul.so|nsFlexContainerFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsFlexContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|4279|0x8
0|2|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|3|libxul.so|nsContainerFrame::ReflowOverflowContainerChildren(nsPresContext*, mozilla::ReflowInput const&, nsOverflowAreas&, nsIFrame::ReflowChildFlags, nsReflowStatus&, void (*)(nsFrameList&, nsFrameList&, nsContainerFrame*))|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1326|0x3b
0|4|libxul.so|nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1344|0x2f
0|5|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|6|libxul.so|nsContainerFrame::ReflowOverflowContainerChildren(nsPresContext*, mozilla::ReflowInput const&, nsOverflowAreas&, nsIFrame::ReflowChildFlags, nsReflowStatus&, void (*)(nsFrameList&, nsFrameList&, nsContainerFrame*))|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1326|0x3b
0|7|libxul.so|nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1344|0x2f
0|8|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|9|libxul.so|nsColumnSetFrame::ReflowChildren(mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&, nsColumnSetFrame::ReflowConfig const&, bool)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|703|0x45
0|10|libxul.so|nsColumnSetFrame::ReflowColumns(mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&, nsColumnSetFrame::ReflowConfig&, bool)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|414|0x5
0|11|libxul.so|nsColumnSetFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1235|0x3f
0|12|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|13|libxul.so|nsContainerFrame::ReflowOverflowContainerChildren(nsPresContext*, mozilla::ReflowInput const&, nsOverflowAreas&, nsIFrame::ReflowChildFlags, nsReflowStatus&, void (*)(nsFrameList&, nsFrameList&, nsContainerFrame*))|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1326|0x3b
0|14|libxul.so|nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1344|0x2f
0|15|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|16|libxul.so|nsContainerFrame::ReflowOverflowContainerChildren(nsPresContext*, mozilla::ReflowInput const&, nsOverflowAreas&, nsIFrame::ReflowChildFlags, nsReflowStatus&, void (*)(nsFrameList&, nsFrameList&, nsContainerFrame*))|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1326|0x3b
0|17|libxul.so|nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1344|0x2f
0|18|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|19|libxul.so|nsColumnSetFrame::ReflowChildren(mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&, nsColumnSetFrame::ReflowConfig const&, bool)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|703|0x45
0|20|libxul.so|nsColumnSetFrame::ReflowColumns(mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&, nsColumnSetFrame::ReflowConfig&, bool)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|414|0x5
0|21|libxul.so|nsColumnSetFrame::FindBestBalanceBSize(mozilla::ReflowInput const&, nsPresContext*, nsColumnSetFrame::ReflowConfig&, nsColumnSetFrame::ColumnBalanceData, mozilla::ReflowOutput&, bool, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1113|0x22
0|22|libxul.so|nsColumnSetFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsColumnSetFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1242|0x3d
0|23|libxul.so|nsBlockReflowContext::ReflowBlock(mozilla::LogicalRect const&, bool, nsCollapsingMargin&, int, bool, nsLineBox*, mozilla::ReflowInput&, nsReflowStatus&, mozilla::BlockReflowInput&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockReflowContext.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|293|0x1e
0|24|libxul.so|nsBlockFrame::ReflowBlockFrame(mozilla::BlockReflowInput&, nsLineList_iterator, bool*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|3773|0x43
0|25|libxul.so|nsBlockFrame::ReflowLine(mozilla::BlockReflowInput&, nsLineList_iterator, bool*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|3122|0x16
0|26|libxul.so|nsBlockFrame::ReflowDirtyLines(mozilla::BlockReflowInput&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|2660|0x24
0|27|libxul.so|nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsBlockFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1377|0xb
0|28|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|29|libxul.so|nsCanvasFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsCanvasFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|750|0x22
0|30|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1074|0x1a
0|31|libxul.so|nsHTMLScrollFrame::ReflowScrolledFrame(mozilla::ScrollReflowInput*, bool, bool, mozilla::ReflowOutput*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsGfxScrollFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|686|0x3a
0|32|libxul.so|nsHTMLScrollFrame::ReflowContents(mozilla::ScrollReflowInput*, mozilla::ReflowOutput const&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsGfxScrollFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|800|0x15
0|33|libxul.so|nsHTMLScrollFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsGfxScrollFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1195|0x15
0|34|libxul.so|nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, int, int, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*)|hg:hg.mozilla.org/mozilla-central:layout/generic/nsContainerFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1114|0x18
0|35|libxul.so|mozilla::ViewportFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&)|hg:hg.mozilla.org/mozilla-central:layout/generic/ViewportFrame.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|297|0x2b
0|36|libxul.so|mozilla::PresShell::DoReflow(nsIFrame*, bool, mozilla::OverflowChangedTracker*)|hg:hg.mozilla.org/mozilla-central:layout/base/PresShell.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|9610|0x1c
0|37|libxul.so|mozilla::PresShell::ProcessReflowCommands(bool)|hg:hg.mozilla.org/mozilla-central:layout/base/PresShell.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|9783|0x12
0|38|libxul.so|mozilla::PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush)|hg:hg.mozilla.org/mozilla-central:layout/base/PresShell.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|4245|0x12
0|39|libxul.so|nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp)|hg:hg.mozilla.org/mozilla-central:layout/base/PresShell.h:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1443|0xb
0|40|libxul.so|mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&)|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|373|0xb
0|41|libxul.so|mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp)|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|367|0x12
0|42|libxul.so|mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp)|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|737|0x17
0|43|libxul.so|mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyParentProcessVsync()|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|639|0x10
0|44|libxul.so|mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::ParentProcessVsyncNotifier::Run()|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|538|0x14
0|45|libxul.so|nsThread::ProcessNextEvent(bool, bool*)|hg:hg.mozilla.org/mozilla-central:xpcom/threads/nsThread.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|1234|0xe
0|46|libxul.so|NS_ProcessNextEvent(nsIThread*, bool)|hg:hg.mozilla.org/mozilla-central:xpcom/threads/nsThreadUtils.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|504|0xc
0|47|libxul.so|mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*)|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessagePump.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|87|0x7
0|48|libxul.so|MessageLoop::RunInternal()|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|316|0x17
0|49|libxul.so|MessageLoop::Run()|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|291|0x8
0|50|libxul.so|nsBaseAppShell::Run()|hg:hg.mozilla.org/mozilla-central:widget/nsBaseAppShell.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|137|0xd
0|51|libxul.so|XRE_RunAppShell()|hg:hg.mozilla.org/mozilla-central:toolkit/xre/nsEmbedFunctions.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|913|0xe
0|52|libxul.so|mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*)|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessagePump.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|237|0x5
0|53|libxul.so|MessageLoop::RunInternal()|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|316|0x17
0|54|libxul.so|MessageLoop::Run()|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|291|0x8
0|55|libxul.so|XRE_InitChildProcess(int, char**, XREChildData const*)|hg:hg.mozilla.org/mozilla-central:toolkit/xre/nsEmbedFunctions.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|744|0x5
0|56|firefox-bin|content_process_main(mozilla::Bootstrap*, int, char**)|hg:hg.mozilla.org/mozilla-central:ipc/contentproc/plugin-container.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|56|0x11
0|57|firefox-bin|main|hg:hg.mozilla.org/mozilla-central:browser/app/nsBrowserApp.cpp:0a4b3f99d2d1b0a6aa73754e38da82a3b58f5635|303|0x20
Flags: in-testsuite?

A Pernosco session is available here: https://pernos.co/debug/OCDq4KOP3IB9SKCzIfIMVg/index.html

Keywords: bugmon
Whiteboard: [bugmon:bisected,confirmed]
Bugmon Analysis: Verified bug as reproducible on mozilla-central 20200702152109-2d709e60c76e. The bug appears to have been introduced in the following build range: > Start: e226df37045d7c9f4f8ef0014e760008c85f9f5e (20200623215007) > End: 91c26c5b1e33c9417048f1628ba0f07827e0c86d (20200623215338) > Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=e226df37045d7c9f4f8ef0014e760008c85f9f5e&tochange=91c26c5b1e33c9417048f1628ba0f07827e0c86d

This is a soft assertion, not crashing on release.

Severity: -- → S4
Component: Layout → Layout: Flexbox

Bugmon Analysis
Testcase crashes using the initial build (mozilla-central 20201205093858-7ce95b6cde26) but not with tip (mozilla-central 20211204095400-04183e5ab506.)
The bug appears to have been fixed in the following build range:

Start: 3ff8ac39b364436a63b387f445899a7db0d3ddd8 (20210802214356)
End: c8c5ee96321f28bab4804ccd2ae5015c920280fd (20210806033613)
Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=3ff8ac39b364436a63b387f445899a7db0d3ddd8&tochange=c8c5ee96321f28bab4804ccd2ae5015c920280fd
Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.

Keywords: bugmon

This was last seen by fuzzers with m-c 20210728-5aec083e0062.

Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → WORKSFORME

Setting regressed_by field after analyzing regression range found by bugmon.

Regressed by: 1647332
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