Description of problem:

After upgrading to fc24, verilator is no longer usable and as it
consistently crash on non-trivial input.


Version-Release number of selected component (if applicable):

3.874-3.fc24


How reproducible:

Consistently crash on non-trivial code.


Steps to Reproduce

1. Get some verilog code, example code in 
    /usr/share/doc/verilator/examples/test_v/
will do

2. compile using:
verilator -cc /usr/share/doc/verilator/examples/test_v/top.v -I/usr/share/doc/verilator/examples/test_v/


Actual results:

No stack.
%Error: Verilator internal fault, sorry.  Consider trying --debug --gdbbt
%Error: Command Failed /usr/bin/verilator_bin --gdbbt -cc /usr/share/doc/verilator/examples/test_v/top.v -I/usr/share/doc/verilator/examples/test_v/


Expected results:

no 'internal fault'(!)


Additional info:

1) The problem seem to be fixed in the latest release '3.884',
tracked in #1087393 .

(Why was the newer packages never pushed?)



2) Running in gdb give this backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7adf9d0 in __dynamic_cast () from /lib64/libstdc++.so.6
(gdb) bt
#0  0x00007ffff7adf9d0 in __dynamic_cast () from /lib64/libstdc++.so.6
#1  0x0000000000669747 in V3ParseGrammar::createVariable(FileLine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, AstRange*, AstNode*) ()
#2  0x000000000066d5d6 in yyparse() ()
#3  0x000000000067eba0 in V3ParseImp::bisonParse() ()
#4  0x0000000000664b33 in V3ParseImp::lexFile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
#5  0x00000000006672a2 in V3ParseImp::parseFile(FileLine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
#6  0x0000000000667ecd in V3Parse::parseFile(FileLine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    ()
#7  0x0000000000406d76 in V3Global::readFiles() ()
#8  0x0000000000407f96 in main ()