Here B2G fails to boot on Otoro, and I see this in logcat: I/Gecko ( 105): ###!!! ASSERTION: Existing entry in disk StartupCache.: 'zipItem == nullptr', file /hack/mozilla-graphics/startupcache/StartupCache.cpp, line 356 I'm getting this with a heavily patched B2G (gfx layers refactoring + bug 835920) so who knows what's causing it. I re-flashed the device, and got that again. Attaching my startupCache from adb pull /data/b2g/mozilla/hqiiogd5.default/startupCache

Got a stack: Breakpoint 2, mozilla::scache::StartupCache::PutBuffer (this=0x40404860, id=0x4374c100 "jar-last-modified-time", inbuf=0xbebcd0c0 "\030\361\b\215<\001", len=8) at /hack/mozilla-graphics/startupcache/StartupCache.cpp:358 358 NS_ASSERTION(zipItem == nullptr, "Existing entry in disk StartupCache."); (gdb) p zipItem $1 = (nsZipItem *) 0x45132034 (gdb) p *zipItem $2 = {next = 0x0, central = 0x44cf0080, nameLength = 22, isSynthetic = false} (gdb) bt #0 mozilla::scache::StartupCache::PutBuffer (this=0x40404860, id=0x4374c100 "jar-last-modified-time", inbuf=0xbebcd0c0 "\030\361\b\215<\001", len=8) at /hack/mozilla-graphics/startupcache/StartupCache.cpp:358 #1 0x424006ec in ExtractFontsFromJar (aLocalDir=0x47821230) at /hack/mozilla-graphics/gfx/thebes/gfxFT2FontList.cpp:981 #2 0x42400a2a in gfxFT2FontList::FindFonts (this=0x4607ddf0) at /hack/mozilla-graphics/gfx/thebes/gfxFT2FontList.cpp:1086 #3 0x42400f0a in gfxFT2FontList::InitFontList (this=0x4607ddf0) at /hack/mozilla-graphics/gfx/thebes/gfxFT2FontList.cpp:1219 #4 0x423fb8e6 in gfxAndroidPlatform::CreatePlatformFontList (this=0x47192700) at /hack/mozilla-graphics/gfx/thebes/gfxAndroidPlatform.cpp:180 #5 0x423e5684 in gfxPlatformFontList::Init () at /hack/mozilla-graphics/gfx/thebes/gfxPlatformFontList.h:92 #6 0x423e65f2 in gfxPlatform::Init () at /hack/mozilla-graphics/gfx/thebes/gfxPlatform.cpp:335 #7 0x423e63b6 in gfxPlatform::GetPlatform () at /hack/mozilla-graphics/gfx/thebes/gfxPlatform.cpp:260 #8 0x41dbdf66 in nsWindow (this=0x4782e500) at /hack/mozilla-graphics/widget/gonk/nsWindow.cpp:192 #9 0x41dbd414 in nsWindowConstructor (aOuter=0x0, aIID=..., aResult=0xbebcd43c) at /hack/mozilla-graphics/widget/gonk/nsWidgetFactory.cpp:39 #10 0x422935b6 in mozilla::GenericFactory::CreateInstance (this=0x471f83f0, aOuter=0x0, aIID=..., aResult=0xbebcd43c) at /hack/b2g/B2G/objdir-gecko/xpcom/build/GenericFactory.cpp:16 #11 0x422e22cc in nsComponentManagerImpl::CreateInstance (this=0x40440200, aClass=..., aDelegate=0x0, aIID=..., aResult=0xbebcd43c) at /hack/mozilla-graphics/xpcom/components/nsComponentManager.cpp:949 #12 0x42286c0a in CallCreateInstance (aCID=..., aDelegate=0x0, aIID=..., aResult=0xbebcd43c) at /hack/b2g/B2G/objdir-gecko/xpcom/build/nsComponentManagerUtils.cpp:125 #13 0x42286dac in nsCreateInstanceByCID::operator() (this=0xbebcd56c, aIID=..., aInstancePtr=0xbebcd43c) at /hack/b2g/B2G/objdir-gecko/xpcom/build/nsComponentManagerUtils.cpp:167 #14 0x40b7d420 in nsCOMPtr<nsIRDFDelegateFactory>::assign_from_helper (this=0x461b8e48, helper=..., aIID=...) at ../../dist/include/nsCOMPtr.h:1223 #15 0x41c0f758 in nsCOMPtr<nsIWidget>::operator= (this=0x461b8e48, rhs=...) at ../../../dist/include/nsCOMPtr.h:691 #16 0x41c25722 in nsWebShellWindow::Initialize (this=0x461b8e20, aParent=0x0, aOpener=0x0, aUrl=0x45e897c0, aInitialWidth=100, aInitialHeight=100, aIsHiddenWindow=true, widgetInitData=...) at /hack/mozilla-graphics/xpfe/appshell/src/nsWebShellWindow.cpp:148 #17 0x41c22e1a in nsAppShellService::JustCreateTopWindow (this=0x471ffe40, aParent=0x0, aUrl=0x45e897c0, aChromeMask=4094, aInitialWidth=100, aInitialHeight=100, aIsHiddenWindow=true, aResult=0xbebcd740) at /hack/mozilla-graphics/xpfe/appshell/src/nsAppShellService.cpp:402 #18 0x41c2285e in nsAppShellService::CreateHiddenWindowHelper (this=0x471ffe40, aIsPrivate=false) at /hack/mozilla-graphics/xpfe/appshell/src/nsAppShellService.cpp:128 #19 0x41c2272e in nsAppShellService::CreateHiddenWindow (this=0x471ffe40) at /hack/mozilla-graphics/xpfe/appshell/src/nsAppShellService.cpp:86 #20 0x41c398c4 in nsAppStartup::CreateHiddenWindow (this=0x452fcd90) at /hack/mozilla-graphics/toolkit/components/startup/nsAppStartup.cpp:257 #21 0x40b87368 in XREMain::XRE_mainRun (this=0xbebcd990) at /hack/mozilla-graphics/toolkit/xre/nsAppRunner.cpp:3758 #22 0x40b877cc in XREMain::XRE_main (this=0xbebcd990, argc=1, argv=0xbebcfba4, aAppData=0x373d4) at /hack/mozilla-graphics/toolkit/xre/nsAppRunner.cpp:3890 #23 0x40b8799a in XRE_main (argc=1, argv=0xbebcfba4, aAppData=0x373d4, aFlags=0) at /hack/mozilla-graphics/toolkit/xre/nsAppRunner.cpp:4093 #24 0x0000a550 in do_main (argc=1, argv=0xbebcfba4) at /hack/mozilla-graphics/b2g/app/nsBrowserApp.cpp:164 #25 0x0000a804 in main (argc=1, argv=0xbebcfba4) at /hack/mozilla-graphics/b2g/app/nsBrowserApp.cpp:249

What's actually killing B2G shortly after this seems to be bug 836441.

Otoro is now an obsolete platform and the code path that rilclient died on that caused this bug didn't ship in v1. Obsoleting.