workFile.DropToolchainStmt()
	} else if *editToolchain != "" {
		if err := workFile.AddToolchainStmt(*editToolchain); err != nil {
			base.Fatalf("go: internal error: %v", err)
		}
	}

	if len(workedits) > 0 {
		for _, edit := range workedits {
			edit(workFile)
		}
	}

	workFile.SortBlocks()
	workFile.Cleanup() // clean file after edits

		// directory can't otherwise determine that those replacements had no effect.
		for _, m := range modload.MainModules.Versions() {
			if workFile := modload.MainModules.WorkFile(); workFile != nil {
				for _, r := range workFile.Replace {
					if replacementWritten[r.Old] {
						// We already recorded this replacement.
						continue
					}
					replacementWritten[r.Old] = true

			args = args[1:]
		}
		vi, err := parseVersionInterval("retract", path, &args, fix)
		if err != nil {
			wrapError(err)
		}
		r.VersionInterval = vi
	}
}

func (f *WorkFile) add(errs *ErrorList, line *Line, verb string, args []string, fix VersionFixer) {
	wrapError := func(err error) {
		*errs = append(*errs, Error{
			Filename: f.Syntax.Name,
			Pos:      line.Start,
			Err:      err,