#0  _int_malloc (av=0x7f22e8000020, bytes=32) at malloc.c:4304
        p = <optimized out>
        fb = 0x7f22e8000030
        nb = 48
        idx = 1
        bin = <optimized out>
        victim = 0x7f21e80396bf
        size = <optimized out>
        victim_index = <optimized out>
        remainder = <optimized out>
        remainder_size = <optimized out>
        block = <optimized out>
        bit = <optimized out>
        map = <optimized out>
        fwd = <optimized out>
        bck = <optimized out>
        errstr = 0x0
        __func__ = "_int_malloc"
#1  0x00007f22f5b4f77d in __GI___libc_malloc (bytes=32) at malloc.c:3660
        ar_ptr = 0x7f22e8000020
        victim = <optimized out>
        hook = <optimized out>
        __func__ = "__libc_malloc"
#2  0x00007f22f61424cd in operator new (sz=32) at ../../../../src/libstdc++-v3/libsupc++/new_op.cc:52
        p = <optimized out>
#3  0x00007f22f187c234 in IPC_OnMessageAvailable (msg=0x7f22e8000be0) at /build/buildd/virtualbox-4.1.2-dfsg/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcdclient.cpp:1374
        fwd = {mPtr = 0x7f22e8000be0}
        innerMsg = <optimized out>
        td = {mRawPtr = 0x20}
#4  0x00007f22f188677d in ConnRead (s=0x2073c80) at /build/buildd/virtualbox-4.1.2-dfsg/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionUnix.cpp:257
        m = <optimized out>
        bytesRead = 78
        complete = 1
        pdata = 0x7f22f7452992 ""
        buf = "$\000\000\000\001\000\000\000\377\250<u\302\310\001F\261\025\214)D\332\021P\001\000\000\002UZ\001\000\000\000\000\000N\000\000\000\001\000\000\000\377\250<u\302\310\001F\261\025\214)D\332\021P\002\000\000\004\257\355\002\000\001\000\000\000*\000\000\000\001\000\000\000\357G\312C\310\353\242G\226y\244p2\030\b\237\003\000\000\000\376Z\000\000\020\257\003\350\"\177\000\000\003\000\000\000\001\000\000\000\377\250<u\302\310\001F\261\025\214)D\332\021P\002\000\000\004\251\355\002\000\003\000\000\000.\000\000\000\001\000\000\000\357G\312C\310\353\242G\226y\244p2\030\b\237\003\000\000\000\316|\000\000\320\003\016\002\000\000\000\000\026\000\377\377\377\377<u\302\310\001F\261\025\214)D\332\021P\002\000\000\004\244\355\002\000\001\000\000\000(\000\000\000\001\000\000\000\357G\312C\310\353\242G\226y\244p2\030\b\237\002\000\000\000\000\000\000\000\260\026\001\340\"\177\000\000\"\177\000\000\a\000\000\000"...
        rv = 0
        n = 0
#5  0x00007f22f1886d63 in ConnThread (arg=0x2073c80) at /build/buildd/virtualbox-4.1.2-dfsg/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionUnix.cpp:361
        cbs_to_run = {mHead = 0x0, mTail = 0x0}
        num = <optimized out>
        rv = 0
        s = 0x2073c80
#6  0x00007f22f66778ea in _pt_root (arg=0x207c070) at /build/buildd/virtualbox-4.1.2-dfsg/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:224
        thred = 0x207c070
        detached = 0
#7  _pt_iprt_root (Thread=<optimized out>, pvUser=0x207c070) at /build/buildd/virtualbox-4.1.2-dfsg/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:272
        thred = 0x207c070
#8  0x00007f22f6b3b29c in rtThreadMain (pThread=0x207c1e0, NativeThread=<optimized out>, pszThreadName=<optimized out>) at /build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Runtime/common/misc/thread.cpp:703
        rc = <optimized out>
#9  0x00007f22f6b87a73 in rtThreadNativeMain (pvArgs=0x207c1e0) at /build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Runtime/r3/posix/thread-posix.cpp:255
        __PRETTY_FUNCTION__ = "void* rtThreadNativeMain(void*)"
        Self = <optimized out>
        pThread = 0x207c1e0
        SigSet = {__val = {8192, 0 <repeats 15 times>}}
        rc = <optimized out>
#10 0x00007f22f6dfbedc in start_thread (arg=0x7f22f7453700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7f22f7453700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3558676612699297218, 140735691740576, 139788154124736, 0, 3, -3519814845022169662, -3519817949749013054}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#11 0x00007f22f5bb489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#12 0x0000000000000000 in ?? ()
No symbol table info available.