We are leaking nsFloaterCache objects according to a Boehm-GC instrumented build. Below is the allocation that is unmatched (forgive the mangled names). I took a quick look at nsLineLayout.cpp, and the leak didn't jump out at me. It looks like nsFloaterCacheList's dtor is trying to free the nsFloaterCache objects allocated in nsFloaterCacheList::Alloc(). Maybe we've somehow screwed the list management? Or, handed out an nsFloaterCache that somebody else was supposed to free? Leaked composite object at: 0x08707BD0 <void*> (76) 0x0913BE08 0x00000001 0x00000000 0x00000000 0x0000002D 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x000018E7 0x00000555 0x000001D1 0x00000000 0x00000000 0x00000528 0x000001D1 0x00000000 Callers at location: Alloc__22nsFloaterCacheFreeList[/export/waterson/seamonkey-gc/mozilla/dist/bin/c omponents/libgklayout.so +0x0037248B] AddFloater__18nsBlockReflowStateR12nsLineLayoutP18nsPlaceholderFramei[/export/wa terson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0033BB5B] AddFloater__12nsLineLayoutP18nsPlaceholderFrame[/export/waterson/seamonkey-gc/mo zilla/dist/bin/components/libgklayout.so +0x003319E4] ReflowFrame__12nsLineLayoutP8nsIFramePP8nsIFrameRUiP19nsHTMLReflowMetricsRi[/exp ort/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0037438A] ReflowInlineFrame__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsI nlineFrame17InlineReflowStateP8nsIFrameRUi[/export/waterson/seamonkey-gc/mozilla /dist/bin/components/libgklayout.so +0x0036EC79] ReflowFrames__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsInline Frame17InlineReflowStateR19nsHTMLReflowMetricsRUi[/export/waterson/seamonkey-gc/ mozilla/dist/bin/components/libgklayout.so +0x0036E69F] Reflow__13nsInlineFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSt ateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0036E427] ReflowFrame__12nsLineLayoutP8nsIFramePP8nsIFrameRUiP19nsHTMLReflowMetricsRi[/exp ort/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0037402A] ReflowInlineFrame__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsI nlineFrame17InlineReflowStateP8nsIFrameRUi[/export/waterson/seamonkey-gc/mozilla /dist/bin/components/libgklayout.so +0x0036EC79] ReflowFrames__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsInline Frame17InlineReflowStateR19nsHTMLReflowMetricsRUi[/export/waterson/seamonkey-gc/ mozilla/dist/bin/components/libgklayout.so +0x0036E69F] Reflow__13nsInlineFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSt ateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0036E427] ReflowFrame__12nsLineLayoutP8nsIFramePP8nsIFrameRUiP19nsHTMLReflowMetricsRi[/exp ort/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0037402A] ReflowInlineFrame__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsI nlineFrame17InlineReflowStateP8nsIFrameRUi[/export/waterson/seamonkey-gc/mozilla /dist/bin/components/libgklayout.so +0x0036EC79] ReflowFrames__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsInline Frame17InlineReflowStateR19nsHTMLReflowMetricsRUi[/export/waterson/seamonkey-gc/ mozilla/dist/bin/components/libgklayout.so +0x0036E69F] Reflow__13nsInlineFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSt ateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0036E427] ReflowFrame__12nsLineLayoutP8nsIFramePP8nsIFrameRUiP19nsHTMLReflowMetricsRi[/exp ort/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0037402A] ReflowInlineFrame__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsI nlineFrame17InlineReflowStateP8nsIFrameRUi[/export/waterson/seamonkey-gc/mozilla /dist/bin/components/libgklayout.so +0x0036EC79] ReflowFrames__13nsInlineFrameP14nsIPresContextRC17nsHTMLReflowStateRQ213nsInline Frame17InlineReflowStateR19nsHTMLReflowMetricsRUi[/export/waterson/seamonkey-gc/ mozilla/dist/bin/components/libgklayout.so +0x0036E69F] Reflow__13nsInlineFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSt ateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0036E427] ReflowFrame__12nsLineLayoutP8nsIFramePP8nsIFrameRUiP19nsHTMLReflowMetricsRi[/exp ort/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0037402A] ReflowInlineFrame__12nsBlockFrameR18nsBlockReflowStateR12nsLineLayoutP9nsLineBox P8nsIFramePUc[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklay out.so +0x00339271] DoReflowInlineFrames__12nsBlockFrameR18nsBlockReflowStateR12nsLineLayoutP9nsLine BoxPiPUcii[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout .so +0x00338F5A] DoReflowInlineFramesAuto__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPiPUcii[ /export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00338D62] ReflowInlineFrames__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPiii[/export/w aterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00338B55] ReflowLine__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPii[/export/waterson/s eamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0033707B] ReflowDirtyLines__12nsBlockFrameR18nsBlockReflowState[/export/waterson/seamonkey -gc/mozilla/dist/bin/components/libgklayout.so +0x00336572] Reflow__12nsBlockFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00333EB0] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] Reflow__16nsTableCellFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflo wStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout. so +0x00531C22] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] InitialReflow__15nsTableRowFrameP14nsIPresContextR19nsHTMLReflowMetricsR14RowRef lowStateRUiP16nsTableCellFramei[/export/waterson/seamonkey-gc/mozilla/dist/bin/c omponents/libgklayout.so +0x00546BB0] Reflow__15nsTableRowFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflow StateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.s o +0x00547970] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] ReflowMappedChildren__20nsTableRowGroupFrameP14nsIPresContextR19nsHTMLReflowMetr icsR19RowGroupReflowStateRUiP15nsTableRowFrame14nsReflowReasonii[/export/waterso n/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00548D1D] Reflow__20nsTableRowGroupFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLR eflowStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklay out.so +0x0054A865] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] ResizeReflowPass1__12nsTableFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHT MLReflowStateRUi14nsReflowReasoni[/export/waterson/seamonkey-gc/mozilla/dist/bin /components/libgklayout.so +0x00539AF0] Reflow__12nsTableFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00539334] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] OuterReflowChild__17nsTableOuterFrameP14nsIPresContextP8nsIFrameRC17nsHTMLReflow StateR19nsHTMLReflowMetricsPiR6nsSizeR8nsMarginN2714nsReflowReasonRUi[/export/wa terson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x005424D2] Reflow__17nsTableOuterFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLRefl owStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout .so +0x00543F00] DoReflowBlock__20nsBlockReflowContextR17nsHTMLReflowState14nsReflowReasonP8nsIFr ameRC6nsRectiiiR8nsMarginRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x003400EA] ReflowBlock__20nsBlockReflowContextP8nsIFrameRC6nsRectiiiR8nsMarginRUi[/export/w aterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0033FA8F] ReflowBlockFrame__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPi[/export/water son/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00338379] ReflowLine__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPii[/export/waterson/s eamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00336C4E] ReflowDirtyLines__12nsBlockFrameR18nsBlockReflowState[/export/waterson/seamonkey -gc/mozilla/dist/bin/components/libgklayout.so +0x00336572] Reflow__12nsBlockFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00333EB0] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] Reflow__16nsTableCellFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflo wStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout. so +0x00531C22] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] InitialReflow__15nsTableRowFrameP14nsIPresContextR19nsHTMLReflowMetricsR14RowRef lowStateRUiP16nsTableCellFramei[/export/waterson/seamonkey-gc/mozilla/dist/bin/c omponents/libgklayout.so +0x00546BB0] Reflow__15nsTableRowFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflow StateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.s o +0x00547970] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] ReflowMappedChildren__20nsTableRowGroupFrameP14nsIPresContextR19nsHTMLReflowMetr icsR19RowGroupReflowStateRUiP15nsTableRowFrame14nsReflowReasonii[/export/waterso n/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00548D1D] Reflow__20nsTableRowGroupFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLR eflowStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklay out.so +0x0054A865] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] ResizeReflowPass1__12nsTableFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHT MLReflowStateRUi14nsReflowReasoni[/export/waterson/seamonkey-gc/mozilla/dist/bin /components/libgklayout.so +0x00539AF0] Reflow__12nsTableFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00539334] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] OuterReflowChild__17nsTableOuterFrameP14nsIPresContextP8nsIFrameRC17nsHTMLReflow StateR19nsHTMLReflowMetricsPiR6nsSizeR8nsMarginN2714nsReflowReasonRUi[/export/wa terson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x005424D2] Reflow__17nsTableOuterFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLRefl owStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout .so +0x00543F00] DoReflowBlock__20nsBlockReflowContextR17nsHTMLReflowState14nsReflowReasonP8nsIFr ameRC6nsRectiiiR8nsMarginRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x003400EA] ReflowBlock__20nsBlockReflowContextP8nsIFrameRC6nsRectiiiR8nsMarginRUi[/export/w aterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0033FA8F] ReflowBlockFrame__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPi[/export/water son/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00338379] ReflowLine__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPii[/export/waterson/s eamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00336C4E] ReflowDirtyLines__12nsBlockFrameR18nsBlockReflowState[/export/waterson/seamonkey -gc/mozilla/dist/bin/components/libgklayout.so +0x00336572] Reflow__12nsBlockFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00333EB0] DoReflowBlock__20nsBlockReflowContextR17nsHTMLReflowState14nsReflowReasonP8nsIFr ameRC6nsRectiiiR8nsMarginRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x003400EA] ReflowBlock__20nsBlockReflowContextP8nsIFrameRC6nsRectiiiR8nsMarginRUi[/export/w aterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0033FA8F] ReflowBlockFrame__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPi[/export/water son/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00338379] ReflowLine__12nsBlockFrameR18nsBlockReflowStateP9nsLineBoxPii[/export/waterson/s eamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00336C4E] ReflowDirtyLines__12nsBlockFrameR18nsBlockReflowState[/export/waterson/seamonkey -gc/mozilla/dist/bin/components/libgklayout.so +0x00336572] Reflow__12nsBlockFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSta teRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x00333EB0] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] Reflow__11CanvasFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowStat eRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x003602D7] Reflow__19nsBoxToBlockAdaptorR16nsBoxLayoutStateP14nsIPresContextR19nsHTMLReflow MetricsRC17nsHTMLReflowStateRUiiiiii[/export/waterson/seamonkey-gc/mozilla/dist/ bin/components/libgklayout.so +0x0058B732] DoLayout__19nsBoxToBlockAdaptorR16nsBoxLayoutState[/export/waterson/seamonkey-gc /mozilla/dist/bin/components/libgklayout.so +0x0058AE73] Layout__5nsBoxR16nsBoxLayoutState[/export/waterson/seamonkey-gc/mozilla/dist/bin /components/libgklayout.so +0x00587F3C] DoLayout__16nsScrollBoxFrameR16nsBoxLayoutState[/export/waterson/seamonkey-gc/mo zilla/dist/bin/components/libgklayout.so +0x0056AF75] Layout__5nsBoxR16nsBoxLayoutState[/export/waterson/seamonkey-gc/mozilla/dist/bin /components/libgklayout.so +0x00587F3C] LayoutChildAt__14nsContainerBoxR16nsBoxLayoutStateP6nsIBoxRC6nsRect[/export/wate rson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0058DD54] LayoutBox__21nsGfxScrollFrameInnerR16nsBoxLayoutStateP6nsIBoxRC6nsRect[/export/w aterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x003AE031] Layout__21nsGfxScrollFrameInnerR16nsBoxLayoutState[/export/waterson/seamonkey-gc /mozilla/dist/bin/components/libgklayout.so +0x003AE27F] DoLayout__16nsGfxScrollFrameR16nsBoxLayoutState[/export/waterson/seamonkey-gc/mo zilla/dist/bin/components/libgklayout.so +0x003AE08B] Layout__5nsBoxR16nsBoxLayoutState[/export/waterson/seamonkey-gc/mozilla/dist/bin /components/libgklayout.so +0x00587F3C] Reflow__10nsBoxFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowState RUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x0059CDCF] Reflow__16nsGfxScrollFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflo wStateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout. so +0x003AD394] ReflowChild__16nsContainerFrameP8nsIFrameP14nsIPresContextR19nsHTMLReflowMetrics RC17nsHTMLReflowStateiiUiRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/comp onents/libgklayout.so +0x00344685] Reflow__13ViewportFrameP14nsIPresContextR19nsHTMLReflowMetricsRC17nsHTMLReflowSt ateRUi[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/libgklayout.so +0x003AB3B7] Dispatch__19nsHTMLReflowCommandP14nsIPresContextR19nsHTMLReflowMetricsRC6nsSizeR 19nsIRenderingContext[/export/waterson/seamonkey-gc/mozilla/dist/bin/components/ libgklayout.so +0x00361DF5] ProcessReflowCommands__9PresShelli[/export/waterson/seamonkey-gc/mozilla/dist/bi n/components/libgklayout.so +0x00390A8F] HandleEvent__11ReflowEvent[/export/waterson/seamonkey-gc/mozilla/dist/bin/compon ents/libgklayout.so +0x006A45C9] ResizeReflow__9PresShellP7nsIViewii[/export/waterson/seamonkey-gc/mozilla/dist/b in/components/libgklayout.so +0x00390601] PL_HandleEvent[./libxpcom.so +0x000CAD6E] PL_ProcessPendingEvents[./libxpcom.so +0x000CAB8C] ProcessPendingEvents__16nsEventQueueImpl[./libxpcom.so +0x000CCAB9] ProcessPendingEvents__16nsEventQueueImpl[./libxpcom.so +0xC7FD714E] gdk_get_show_events[/usr/lib/libgdk-1.2.so.0 +0x000161EB] g_io_add_watch[/usr/lib/libglib-1.2.so.0 +0x0000EACA] g_get_current_time[/usr/lib/libglib-1.2.so.0 +0x00010186] g_get_current_time[/usr/lib/libglib-1.2.so.0 +0x00010751] g_main_run[/usr/lib/libglib-1.2.so.0 +0x000108F1] gtk_main[/usr/lib/libgtk-1.2.so.0 +0x0008C5B9] gtk_main[/usr/lib/libgtk-1.2.so.0 +0xC7E30AC5] __libc_start_main[/lib/libc.so.6 +0x000189CB]

FWIW, this appears to be a relatively minor leak, at 76 bytes per.

Triaging karnaze's bugs.

Moving to Moz1.1. Engineers are overloaded with higher priority bugs.

We now have ctor/dtor logging for the float cache, and it's not coming up as a leak on the tinderboxen that run with refcount logging. Any idea on how to reproduce this or whether it's a problem at all at this point?

Is it a duplicate of bug 302438 ?

Yeah, probably. *** This bug has been marked as a duplicate of 302438 ***