q := NewQueue(1)
	select {
	case <-q.Idle():
	default:
		t.Errorf("NewQueue(1) is not initially idle.")
	}

	started := make(chan struct{})
	unblock := make(chan struct{})
	q.Add(func() {
		close(started)
		<-unblock
	})

	<-started
	idle := q.Idle()
	select {
	case <-idle:
		t.Errorf("NewQueue(1) is marked idle while processing work.")
	default:
	}

	close(unblock)

	if b == "" {
		b = "power8"
	}
	goppc64 = b

	b = os.Getenv("GORISCV64")
	if b == "" {
		b = "rva20u64"
	}
	goriscv64 = b

	if p := pathf("%s/src/all.bash", goroot); !isfile(p) {
		fatalf("$GOROOT is not set correctly or not exported\n"+
			"\tGOROOT=%s\n"+
			"\t%s does not exist", goroot, p)
	}

	b = os.Getenv("GOHOSTARCH")
	if b != "" {
		gohostarch = b
	}

	allPatternIsRoot bool // Is the "all" pattern an additional root?

	listRoots func(rs *Requirements) []string
}

func (ld *loader) reset() {
	select {
	case <-ld.work.Idle():
	default:
		panic("loader.reset when not idle")
	}

	ld.roots = nil
	ld.pkgCache = new(par.Cache[string, *loadPkg])
	ld.pkgs = nil
}

// error reports an error via either os.Stderr or base.Error,

					enqueue(r, nextPruning)
				}
			}
		})
	}

	mustHaveGoRoot(roots)
	for _, m := range roots {
		enqueue(m, pruning)
	}
	<-loadQueue.Idle()

	// Reload any dependencies of the main modules which are not
	// at their selected versions at workspace mode, because the
	// requirements don't accurately reflect the transitive imports.
	if pruning == workspace {

pkg crypto/tls, method (*ConnectionState) ExportKeyingMaterial(string, []uint8, int) ([]uint8, error)
pkg database/sql, method (IsolationLevel) String() string
pkg database/sql, type DBStats struct, Idle int
pkg database/sql, type DBStats struct, InUse int
pkg database/sql, type DBStats struct, MaxIdleClosed int64
pkg database/sql, type DBStats struct, MaxLifetimeClosed int64

				return filepath.SkipDir
			}
			return nil
		})
		if err != nil {
			m.AddError(err)
		}
	}

	// Wait for all in-flight operations to complete before returning.
	defer func() {
		<-q.Idle()
		sort.Strings(m.Pkgs) // sort everything we added for determinism
	}()

	if filter == includeStd {
		walkPkgs(cfg.GOROOTsrc, "", pruneGoMod)
		if treeCanMatch("cmd") {

pkg net, type KeepAliveConfig struct #62254
pkg net, type KeepAliveConfig struct, Count int #62254
pkg net, type KeepAliveConfig struct, Enable bool #62254
pkg net, type KeepAliveConfig struct, Idle time.Duration #62254
pkg net, type KeepAliveConfig struct, Interval time.Duration #62254
pkg net, type ListenConfig struct, KeepAliveConfig KeepAliveConfig #62254
pkg net/http, func ParseCookie(string) ([]*Cookie, error) #66008

	for _, q := range r.wildcardQueries {
		q := q
		r.work.Add(func() {
			if q.version == "none" {
				r.queryNone(ctx, q)
			} else {
				r.queryWildcard(ctx, q)
			}
		})
	}
	<-r.work.Idle()
}

// queryWildcard adds a candidate set to q for each module for which:
//   - some version of the module is already in the build list, and
//   - that module exists at some version matching q.version, and

			if len(st.backlog) == 0 {
				if st.active--; st.active == 0 && st.idle != nil {
					close(st.idle)
				}
				q.st <- st
				return
			}
			f, st.backlog = st.backlog[0], st.backlog[1:]
			q.st <- st
		}
	}()
}

// Idle returns a channel that will be closed when q has no (active or enqueued)
// work outstanding.
func (q *Queue) Idle() <-chan struct{} {
	st := <-q.st
	defer func() { q.st <- st }()

	}
	return real
}

// isdir reports whether p names an existing directory.
func isdir(p string) bool {
	fi, err := os.Stat(p)
	return err == nil && fi.IsDir()
}

// isfile reports whether p names an existing file.
func isfile(p string) bool {
	fi, err := os.Stat(p)
	return err == nil && fi.Mode().IsRegular()
}

// mtime returns the modification time of the file p.
func mtime(p string) time.Time {