Yacc: reduce/reduce

[alphaoide]

I got message from yacc as follows

$yacc -v parser.y
conflicts: 2 reduce/reduce

Now the figure "2", does it refer to state 2 or grammar 2 in y.output?

[alphaoide]

I guess it refers to state 2

state 2
  0 $accept: program . $end
  $end shift, and go to state 4

Doesn't the conflict message says that input: program . $end, can be reduced into two different "right hand side"s: $accept and what is the other one?

Why doesn't my conflict message say it more clearly like the following example from a website?

5: reduce/reduce conflict (reduce 3, reduce 4) on c
state 5
        B : x y .  (3)
        E : x y .  (4)

[okinrus]

Now the figure "2", does it refer to state 2 or grammar 2 in y.output?

It refers to state 2, I believe. Down below, you ought to be able to look at the state machine the grammer generates. When there's a reduce-reduce, you'll have two possible reduce transitions. Your yacc is likely symbolically linked to bison which might explain the different output file.