Error message when comparing table.apply() does not give a hint where the issue was

[apinski-cavium]

Take:

#include <core.p4>

control c(in bit t)
{
  table tt {
    actions = {}
  }
  apply {
    if (tt.apply() == tt.apply()) {
    }
  }
}

control ct(in bit t);
package pt(ct c);

pt(c()) main;

With p4test we get:

t-1.p4(5): [--Werror=not-found] error: tt: declaration not found
  table tt {
        ^^

There is no hint that the problem is related to the tt.apply() == tt.apply() expression. But points you to the declaration of the table tt.