lineAt(fset, pos[specIndex].Start)+1 == lineAt(fset, g.Pos()) {
			specIndex++
			left = true
		}
		s := specs[specIndex].(*ImportSpec)
		importComments[s] = append(importComments[s], cgPos{left: left, cg: g})
	}

	// Sort the import specs by import path.
	// Remove duplicates, when possible without data loss.
	// Reassign the import paths to have the same position sequence.

	checkPkg := func(t *testing.T, m *Module, pkg string, data []byte) {
		p := m.Package(pkg)
		bp, err := p.Import(build.Default, build.ImportComment)
		if err != nil {
			t.Fatal(err)
		}
		bp1, err := build.Default.Import(".", filepath.Join(src, pkg), build.ImportComment)
		if err != nil {
			t.Fatal(err)
		}

		if !reflect.DeepEqual(bp, bp1) {
			t.Errorf("mismatch")
			t.Logf("index:\n%s", hex.Dump(data))