[ndnSIM] Compilng error during the usage of "name.toUri()"

[Alex Afanasyev]

> On Nov 20, 2016, at 10:15 PM, ZHANG, Lu <lu.zhang at fuji.waseda.jp> wrote:
> 
> Hi all,
> 
> I would like to print out the prefix name in PIT on to screen by using the toUri() function in Name class. The topology is simple as below:
> 
> 
>  *      +----------+     10Mbps      +--------+     10Mbps    +----------+
>  *      | consumer | <------------> | router | <------------> | producer |
>  *      +----------+         10ms      +--------+          10ms   +----------+
>  *
> 
> 
> Part of my program is like below:
> 
>   Ptr<ndn::Pit> pit = nodes.Get(1)->GetObject<ndn::Pit> ();
>   Ptr<ndn::pit::Entry> entry = pit->Find(ns3::ndn::Name("/prefix")); 
>   ns3::ndn::Name name = entry-> GetPrefix();
>   name.toUri();
> 
> When executing compile command ./waf --run 1 --vis I got below output:
> 
> Command ['/home/11/ndnSIM/ns-3/build/scratch/1', '--SimulatorImplementationType=ns3::VisualSimulatorImpl'] terminated with signal SIGSEGV. Run it under a debugger to get more information (./waf --run <program> --command-template="gdb --args %s <args>").
> 
> Any one have clue on why this happens or how should I use the toUri() function?

You can check to run the scenario in the debugger using the suggested command, but I would suspect that you're simply getting a segfault because there is no "/prefix" entry in the PIT (Find returns NULL and then you're dereferencing NULL).

---
Alex