Incorrect error count when using the unsupported unary plus

[0xmohit]

Executing the following:

fn main() {
  2 + +2;
}

results in:

foo.rs:2:7: 2:8 error: expected expression, found `+`
foo.rs:2   2 + +2;
               ^
error: aborting due to 2 previous errors

The reference makes it clear that the above code would be rejected. However, the error count indicated doesn't appear to be correct.

[TimNN]

Introduced between nightly-2016-04-22 and nightly-2016-04-25 (Changes)

I'm pretty sure I found the problem and should have a fix ready soon.