1870897 - Assertion failure: cbSize.BSize(wm) == NS_UNCONSTRAINEDSIZE (Why provide a percentage basis when the containing block's block-size is definite?), at /builds/worker/checkouts/gecko/layout/generic/ReflowInput.cpp:2083

Status: RESOLVED DUPLICATE of bug 1870103

(Core :: Layout, defect)

Description

[Tyson Smith [:tsmith]]

Attachment: testcase.html

Found while fuzzing m-c 20231219-ad0cefd58a2a (--enable-debug --enable-fuzzing)

To reproduce via Grizzly Replay:

$ pip install fuzzfetch grizzly-framework
$ python -m fuzzfetch -d --fuzzing -n firefox
$ python -m grizzly.replay ./firefox/firefox testcase.html

Assertion failure: cbSize.BSize(wm) == NS_UNCONSTRAINEDSIZE (Why provide a percentage basis when the containing block's block-size is definite?), at /builds/worker/checkouts/gecko/layout/generic/ReflowInput.cpp:2083

#0 0x7f9e93fc50aa in mozilla::ReflowInput::ComputeContainingBlockRectangle(nsPresContext*, mozilla::ReflowInput const*) const /builds/worker/checkouts/gecko/layout/generic/ReflowInput.cpp:2081:5
#1 0x7f9e93fbd45d in mozilla::ReflowInput::InitConstraints(nsPresContext*, mozilla::Maybe<mozilla::LogicalSize> const&, mozilla::Maybe<mozilla::LogicalMargin> const&, mozilla::Maybe<mozilla::LogicalMargin> const&, mozilla::LayoutFrameType) /builds/worker/checkouts/gecko/layout/generic/ReflowInput.cpp:2188:16
#2 0x7f9e93fbad21 in mozilla::ReflowInput::Init(nsPresContext*, mozilla::Maybe<mozilla::LogicalSize> const&, mozilla::Maybe<mozilla::LogicalMargin> const&, mozilla::Maybe<mozilla::LogicalMargin> const&) /builds/worker/checkouts/gecko/layout/generic/ReflowInput.cpp:376:3
#3 0x7f9e941a834c in nsTextControlFrame::ReflowTextControlChild(nsIFrame*, nsPresContext*, mozilla::ReflowInput const&, nsReflowStatus&, mozilla::ReflowOutput&, int&) /builds/worker/checkouts/gecko/layout/forms/nsTextControlFrame.cpp:729:18
#4 0x7f9e941a7ef3 in nsTextControlFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/forms/nsTextControlFrame.cpp:688:7
#5 0x7f9e940109ae in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /builds/worker/checkouts/gecko/layout/generic/nsContainerFrame.cpp:887:14
#6 0x7f9e9403b0ba in nsFlexContainerFrame::ReflowFlexItem(nsFlexContainerFrame::FlexboxAxisTracker const&, mozilla::ReflowInput const&, nsFlexContainerFrame::FlexItem const&, mozilla::LogicalPoint const&, mozilla::LogicalSize const&, nsSize const&) /builds/worker/checkouts/gecko/layout/generic/nsFlexContainerFrame.cpp:6210:3
#7 0x7f9e94037f75 in nsFlexContainerFrame::ReflowChildren(mozilla::ReflowInput const&, nsSize const&, mozilla::LogicalSize const&, mozilla::LogicalMargin const&, nsFlexContainerFrame::FlexboxAxisTracker const&, nsFlexContainerFrame::FlexLayoutResult&, nsFlexContainerFrame::PerFragmentFlexData&) /builds/worker/checkouts/gecko/layout/generic/nsFlexContainerFrame.cpp:5659:13
#8 0x7f9e94034f46 in nsFlexContainerFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsFlexContainerFrame.cpp:4702:7
#9 0x7f9e93ffca09 in nsBlockReflowContext::ReflowBlock(mozilla::LogicalRect const&, bool, nsCollapsingMargin&, int, nsLineBox*, mozilla::ReflowInput&, nsReflowStatus&, mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockReflowContext.cpp:290:11
#10 0x7f9e93ff8810 in nsBlockFrame::ReflowBlockFrame(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:4311:11
#11 0x7f9e93ff5ff6 in nsBlockFrame::ReflowLine(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3643:5
#12 0x7f9e93ff07e0 in nsBlockFrame::ReflowDirtyLines(mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3156:9
#13 0x7f9e93fec5bb in nsBlockFrame::TrialReflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsBlockFrame::TrialReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1906:3
#14 0x7f9e93fea59f in nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1552:9
#15 0x7f9e940109ae in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /builds/worker/checkouts/gecko/layout/generic/nsContainerFrame.cpp:887:14
#16 0x7f9e94012bd6 in nsColumnSetFrame::ReflowColumns(mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&, nsColumnSetFrame::ReflowConfig const&, bool) /builds/worker/checkouts/gecko/layout/generic/nsColumnSetFrame.cpp:700:7
#17 0x7f9e940145a7 in nsColumnSetFrame::FindBestBalanceBSize(mozilla::ReflowInput const&, nsPresContext*, nsColumnSetFrame::ReflowConfig&, nsColumnSetFrame::ColumnBalanceData, mozilla::ReflowOutput&, bool, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsColumnSetFrame.cpp:1134:9
#18 0x7f9e94014dfe in nsColumnSetFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsColumnSetFrame.cpp:1252:5
#19 0x7f9e93ffca09 in nsBlockReflowContext::ReflowBlock(mozilla::LogicalRect const&, bool, nsCollapsingMargin&, int, nsLineBox*, mozilla::ReflowInput&, nsReflowStatus&, mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockReflowContext.cpp:290:11
#20 0x7f9e93ff8810 in nsBlockFrame::ReflowBlockFrame(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:4311:11
#21 0x7f9e93ff5ff6 in nsBlockFrame::ReflowLine(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3643:5
#22 0x7f9e93ff07e0 in nsBlockFrame::ReflowDirtyLines(mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3156:9
#23 0x7f9e93fec5bb in nsBlockFrame::TrialReflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsBlockFrame::TrialReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1906:3
#24 0x7f9e93fea59f in nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1552:9
#25 0x7f9e93ffca09 in nsBlockReflowContext::ReflowBlock(mozilla::LogicalRect const&, bool, nsCollapsingMargin&, int, nsLineBox*, mozilla::ReflowInput&, nsReflowStatus&, mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockReflowContext.cpp:290:11
#26 0x7f9e93ff8810 in nsBlockFrame::ReflowBlockFrame(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:4311:11
#27 0x7f9e93ff5ff6 in nsBlockFrame::ReflowLine(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3643:5
#28 0x7f9e93ff07e0 in nsBlockFrame::ReflowDirtyLines(mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3156:9
#29 0x7f9e93fec5bb in nsBlockFrame::TrialReflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsBlockFrame::TrialReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1906:3
#30 0x7f9e93fea59f in nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1552:9
#31 0x7f9e93ffca09 in nsBlockReflowContext::ReflowBlock(mozilla::LogicalRect const&, bool, nsCollapsingMargin&, int, nsLineBox*, mozilla::ReflowInput&, nsReflowStatus&, mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockReflowContext.cpp:290:11
#32 0x7f9e93ff8810 in nsBlockFrame::ReflowBlockFrame(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:4311:11
#33 0x7f9e93ff5ff6 in nsBlockFrame::ReflowLine(mozilla::BlockReflowState&, nsLineList_iterator, bool*) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3643:5
#34 0x7f9e93ff07e0 in nsBlockFrame::ReflowDirtyLines(mozilla::BlockReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:3156:9
#35 0x7f9e93fec5bb in nsBlockFrame::TrialReflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsBlockFrame::TrialReflowState&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1906:3
#36 0x7f9e93fea59f in nsBlockFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsBlockFrame.cpp:1552:9
#37 0x7f9e940109ae in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /builds/worker/checkouts/gecko/layout/generic/nsContainerFrame.cpp:887:14
#38 0x7f9e9400fe0d in nsCanvasFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsCanvasFrame.cpp:760:7
#39 0x7f9e940109ae in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, mozilla::WritingMode const&, mozilla::LogicalPoint const&, nsSize const&, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /builds/worker/checkouts/gecko/layout/generic/nsContainerFrame.cpp:887:14
#40 0x7f9e94061525 in nsHTMLScrollFrame::ReflowScrolledFrame(mozilla::ScrollReflowInput&, bool, bool, mozilla::ReflowOutput*) /builds/worker/checkouts/gecko/layout/generic/nsGfxScrollFrame.cpp:938:3
#41 0x7f9e9406234e in nsHTMLScrollFrame::ReflowContents(mozilla::ScrollReflowInput&, mozilla::ReflowOutput const&) /builds/worker/checkouts/gecko/layout/generic/nsGfxScrollFrame.cpp:1071:3
#42 0x7f9e94066ffc in nsHTMLScrollFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/nsGfxScrollFrame.cpp:1508:3
#43 0x7f9e93fde38a in nsContainerFrame::ReflowChild(nsIFrame*, nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, int, int, nsIFrame::ReflowChildFlags, nsReflowStatus&, nsOverflowContinuationTracker*) /builds/worker/checkouts/gecko/layout/generic/nsContainerFrame.cpp:928:14
#44 0x7f9e93fddb12 in mozilla::ViewportFrame::Reflow(nsPresContext*, mozilla::ReflowOutput&, mozilla::ReflowInput const&, nsReflowStatus&) /builds/worker/checkouts/gecko/layout/generic/ViewportFrame.cpp:379:7
#45 0x7f9e93ec6ed4 in mozilla::PresShell::DoReflow(nsIFrame*, bool, mozilla::OverflowChangedTracker*) /builds/worker/checkouts/gecko/layout/base/PresShell.cpp:9689:11
#46 0x7f9e93ef042f in mozilla::PresShell::ProcessReflowCommands(bool) /builds/worker/checkouts/gecko/layout/base/PresShell.cpp:9862:22
#47 0x7f9e93ed1378 in DoFlushLayout /builds/worker/checkouts/gecko/layout/base/PresShell.cpp:9933:10
#48 0x7f9e93ed1378 in mozilla::PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush) /builds/worker/checkouts/gecko/layout/base/PresShell.cpp:4343:11
#49 0x7f9e90237ebf in FlushPendingNotifications /builds/worker/workspace/obj-build/dist/include/mozilla/PresShell.h:1474:5
#50 0x7f9e90237ebf in mozilla::dom::Document::FlushPendingNotifications(mozilla::ChangesToFlush) /builds/worker/checkouts/gecko/dom/base/Document.cpp:10899:16
#51 0x7f9e8f5ef8ae in nsDocLoader::DocLoaderIsEmpty(bool, mozilla::Maybe<nsresult> const&) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:740:14
#52 0x7f9e8f5f0d81 in nsDocLoader::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:678:5
#53 0x7f9e953fd3bf in nsDocShell::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:13838:23
#54 0x7f9e8e80815f in mozilla::net::nsLoadGroup::NotifyRemovalObservers(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:631:22
#55 0x7f9e8e8096a0 in mozilla::net::nsLoadGroup::RemoveRequest(nsIRequest*, nsISupports*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:535:10
#56 0x7f9e9023d2ac in mozilla::dom::Document::DoUnblockOnload() /builds/worker/checkouts/gecko/dom/base/Document.cpp:11688:18
#57 0x7f9e90223276 in mozilla::dom::Document::DispatchContentLoadedEvents() /builds/worker/checkouts/gecko/dom/base/Document.cpp:8157:3
#58 0x7f9e902d7199 in operator()<> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1164:18
#59 0x7f9e902d7199 in __invoke_impl<void, (lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1163:9)> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:60:14
#60 0x7f9e902d7199 in __invoke<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1163:9)> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:95:14
#61 0x7f9e902d7199 in __apply_impl<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1163:9), std::tuple<> &> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/tuple:1678:14
#62 0x7f9e902d7199 in apply<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1163:9), std::tuple<> &> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/tuple:1687:14
#63 0x7f9e902d7199 in apply<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1162:12
#64 0x7f9e902d7199 in mozilla::detail::RunnableMethodImpl<mozilla::dom::Document*, void (mozilla::dom::Document::*)(), true, (mozilla::RunnableKind)0>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1213:13
#65 0x7f9e8e5c3c97 in mozilla::RunnableTask::Run() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:557:16
#66 0x7f9e8e5b98a3 in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:884:26
#67 0x7f9e8e5b8097 in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:707:15
#68 0x7f9e8e5b8515 in mozilla::TaskController::ProcessPendingMTTask(bool) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:493:36
#69 0x7f9e8e5c7c06 in operator() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:211:37
#70 0x7f9e8e5c7c06 in mozilla::detail::RunnableFunction<mozilla::TaskController::TaskController()::$_0>::Run() /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.h:548:5
#71 0x7f9e8e5dcf32 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1199:16
#72 0x7f9e8e5e405d in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:480:10
#73 0x7f9e8f2b4a05 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:85:21
#74 0x7f9e8f1ce541 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:363:3
#75 0x7f9e8f1ce541 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:345:3
#76 0x7f9e93acedb8 in nsBaseAppShell::Run() /builds/worker/checkouts/gecko/widget/nsBaseAppShell.cpp:148:27
#77 0x7f9e93b8bce8 in nsAppShell::Run() /builds/worker/checkouts/gecko/widget/gtk/nsAppShell.cpp:470:33
#78 0x7f9e95ba724b in XRE_RunAppShell() /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:721:20
#79 0x7f9e8f2b58e6 in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:235:9
#80 0x7f9e8f1ce541 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:363:3
#81 0x7f9e8f1ce541 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:345:3
#82 0x7f9e95ba6ab2 in XRE_InitChildProcess(int, char**, XREChildData const*) /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:656:34
#83 0x5651be5d2f76 in content_process_main /builds/worker/checkouts/gecko/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
#84 0x5651be5d2f76 in main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:375:18
#85 0x7f9ea3c29d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#86 0x7f9ea3c29e3f in __libc_start_main csu/../csu/libc-start.c:392:3
#87 0x5651be5a8ca8 in _start (/home/user/workspace/browsers/m-c-20231219152636-fuzzing-debug/firefox-bin+0x58ca8) (BuildId: 90d3f5cabd64731666bc1ea1e49f1b6315f5502c)

Comment 1

[Bugmon [:jkratzer for issues]]

Verified bug as reproducible on mozilla-central 20231219231600-7c63a9afa964.
The bug appears to have been introduced in the following build range:

Start: 30004166d9f2cc3399da68e8762c35b1b886c0dc (20231206051837)
End: 63afa0f8febdc8b199d998d50bb76fc8f7945c3e (20231206090958)
Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=30004166d9f2cc3399da68e8762c35b1b886c0dc&tochange=63afa0f8febdc8b199d998d50bb76fc8f7945c3e

Comment 2

[Ting-Yu Lin [:TYLin] (PDT, UTC-7)]

I've landed a fix in bug 1870103. I guess this bug is filed again because I changed how the assertion looks like in https://bugzilla.mozilla.org/show_bug.cgi?id=1870572#c1.

Comment 3

[Bugmon [:jkratzer for issues]]

No valid actions for resolution (DUPLICATE).
Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.