err_004.expr

T.concat
  [
    "user error: event has duplicate types \"bar\" while it already bears the type \"foo\"\n",
    "test/data/parser/err_004.clp:3:\n",
    "  |   type:foo\n",
    "3 |   type:bar\n",
    "  |   ^^^^^^^^\n",
    "  | \n"]