Crash found in bison-3.0.4

[stuartly]

I try to fuzz bison-3.0.4, and I detect a crash in two minutes. The crash information is as below:

stly@stly-XPS-8700:~/Desktop/TargetFuzz/Benchmark/bison-3.0.4$ ./installed-Org/bin/bison out/crashes/id:000000,sig:06,src:000004,op:flip1,pos:560
bison: src/reader.c:768: void check_and_convert_grammar(void): Assertion `nsyms == ntokens + nvars' failed.
Aborted

From: Distrotech/bison#1
id.000000.sig.06.src.000004.op.flip1.pos.560.tar.gz

[akimd]

Hi,
Thanks for the report. Bison 3.0.4 is more than 6 years old, and that bug was fixed long ago. The current release is 3.7.5, and 3.7.6 should be published soon.
Cheers!