want0 := "mode: set"
	if lines[0] != want0 {
		dumplines(lines[0:10])
		t.Errorf("textfmt: want %s got %s", want0, lines[0])
	}
	want1 := mainPkgPath + "/prog1.go:13.14,15.2 1 1"
	if lines[1] != want1 {
		dumplines(lines[0:10])
		t.Errorf("textfmt: want %s got %s", want1, lines[1])
	}
}

func dumplines(lines []string) {
	for i := range lines {
		fmt.Fprintf(os.Stderr, "%s\n", lines[i])

				t.Log("File tables do not match. Got:")
				dumpFiles(t, lr.Files())
				t.Log("Want:")
				dumpFiles(t, files[0])
				t.Fail()
			}
			files = files[1:]
		}
	}

	// Compare line tables.
	if !compareLines(t, got, want) {
		t.Log("Line tables do not match. Got:")
		dumpLines(t, got)
		t.Log("Want:")
		dumpLines(t, want)
		t.FailNow()
	}
}