Built against master branch 801dd40666d1e6009920ad3ff755c7bb993b2a62:

    $ ./bitcoind -wallet=/tmp/wallet.dat
    Error: Error loading wallet /tmp/wallet.dat. -wallet parameter must only specify a filename (not a path).
    Segmentation fault
    $ 

It's crashing here:

    Thread 1 "bitcoin-shutoff" received signal SIGSEGV, Segmentation fault.
    CConnman::Stop (this=0x0) at net.cpp:2405
    2405	    if (threadMessageHandler.joinable())
    (gdb) where
    #0  CConnman::Stop (this=0x0) at net.cpp:2405
    #1  0x00005555555a57fb in Shutdown () at init.cpp:197
    #2  0x00005555555997fb in AppInit (argc=<optimized out>, argv=<optimized out>) at bitcoind.cpp:183
    #3  0x0000555555599a39 in main (argc=0, argv=0x0) at bitcoind.cpp:195
    (gdb) 
{
    fRequestShutdown = true;
}
static void HandleSIGHUP(int)
{
    fReopenDebugLog = true;
}
#ifndef WIN32
static void registerSignalHandler(int signal, void(*handler)(int))
{
    struct sigaction sa;
    sa.sa_handler = handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = 0;
    sigaction(signal, &sa, nullptr);
}
#endif
void OnRPCStarted()
{
    uiInterface.NotifyBlockTip.connect(&RPCNotifyBlockChange);
}
void OnRPCStopped()
{
    uiInterface.NotifyBlockTip.disconnect(&RPCNotifyBlockChange);
    RPCNotifyBlockChange(false, nullptr);
    cvBlockChange.notify_all();
    LogPrint(BCLog::RPC, "RPC stopped.\n");
}
std::string HelpMessage(HelpMessageMode mode)