Segfault on missing action parameters

[ngsrinivas]

Hi,

In the attached source file, when I call the action set_nhop from an apply block without arguments, I get a segfault from the compiler. The compiler should instead complain about missing action parameters.

[flow:p4c]$  ./build/p4test problematic.p4 
libc++abi.dylib: terminating with uncaught exception of type Util::CompilerBug: COMPILER BUG: ../lib/crash.cpp:226
Exiting with SIGSEGV

When I change the apply block in the ingress control to include a parameter for set_nhop, i.e.,

    apply {
        r1_filter();
        set_nhop(8w3);
    }
}

the file validates correctly.

problematic.txt