In test suite, strange error-pattern behavior on lines with a *

[catamorphism]

// error-pattern: type cat cannot be dereferenced
class cat { new() {} }

fn main() {
  let kitty : cat = cat();
  log (error, *kitty);
}

This test fails correctly as is, but if I move the error pattern to be a //! ERROR comment on the same line with log (error, *kitty);, the test runner complains it didn't find the expected error pattern. As rustc reports the error on the correct line, I can only guess this has something to do with the asterisk in *kitty, but I'm not totally sure.

[nikomatsakis]

Dup of #1476