if buildPackage.ImportPath == "builtin" {
			unexported = true
		}

		symbol, method = parseSymbol(sym)
		pkg := parsePackage(writer, buildPackage, userPath)
		paths = append(paths, pkg.prettyPath())

		defer func() {
			pkg.flush()
			e := recover()
			if e == nil {
				return
			}
			pkgError, ok := e.(PackageError)
			if ok {
				err = pkgError
				return
			}

func (p PackageError) Error() string {
	return string(p)
}

// prettyPath returns a version of the package path that is suitable for an
// error message. It obeys the import comment if present. Also, since
// pkg.build.ImportPath is sometimes the unhelpful "" or ".", it looks for a
// directory name in GOROOT or GOPATH if that happens.
func (pkg *Package) prettyPath() string {
	path := pkg.build.ImportComment
	if path == "" {