chenhg5/cc-connect · critical

generate cron id: %w

Error message

generate cron id: %w

What it means

GenerateCronID reads 4 random bytes from crypto/rand to build a hex job id; if the OS entropy source fails, it panics with 'generate cron id: %w'. This is treated as an unrecoverable environment failure because unique ids cannot be produced without it.

Source

Thrown at core/cron.go:739

	} else {
		slog.Info("cron: job completed", "id", job.ID, "manual", manual)
	}
}

// mutePlatform wraps a Platform and discards all outgoing messages.
// Used for muted cron jobs that should execute without sending chat messages.
type mutePlatform struct {
	Platform
}

func (m *mutePlatform) Reply(_ context.Context, _ any, _ string) error { return nil }
func (m *mutePlatform) Send(_ context.Context, _ any, _ string) error  { return nil }


func GenerateCronID() string {
	b := make([]byte, 4)
	if _, err := rand.Read(b); err != nil {
		panic(fmt.Errorf("generate cron id: %w", err))
	}
	return hex.EncodeToString(b)
}

func truncateStr(s string, n int) string {
	runes := []rune(s)
	if len(runes) <= n {
		return s
	}
	return string(runes[:n]) + "..."
}

var cronWeekdays = map[Language][7]string{
	LangEnglish:            {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"},
	LangChinese:            {"周日", "周一", "周二", "周三", "周四", "周五", "周六"},
	LangTraditionalChinese: {"週日", "週一", "週二", "週三", "週四", "週五", "週六"},
	LangJapanese:           {"日曜", "月曜", "火曜", "水曜", "木曜", "金曜", "土曜"},
	LangSpanish:            {"domingo", "lunes", "martes", "miércoles", "jueves", "viernes", "sábado"},

View on GitHub (pinned to 4000b2338a)

Solutions

1. Restore /dev/urandom access or unblock the getrandom syscall in the sandbox/seccomp profile
2. Restart the daemon on a properly configured host
3. Wrap the call site to recover from the panic if ids can be supplied externally

Example fix

// before
id := core.GenerateCronID() // panics if entropy unavailable
// after
func safeCronID() (id string, err error) {
    defer func() { if r := recover(); r != nil { err = fmt.Errorf("cron id: %v", r) } }()
    return core.GenerateCronID(), nil
}

func safeCronID() (id string, err error) {
    defer func() { if r := recover(); r != nil { err = fmt.Errorf("generate cron id: %v", r) } }()
    return core.GenerateCronID(), nil
}

When it happens

Trigger: rand.Read failing due to a broken/depleted /dev/urandom, a seccomp/sandbox policy blocking the getrandom syscall, or running in a container without proper entropy device setup.

Common situations: Hardened containers restricting syscalls, chroot environments missing /dev/urandom, or exotic OS images with misconfigured entropy.

Understand the failure class

Background: "environment variable is not set" and "Missing keys in environment" errors: what missing required env var messages mean and how to fix them — this error's family across 28 libraries.

Related errors

• generate permission bridge token: %w
• listen for Agy permission hooks: %w
• resolve home directory for Agy permission bridge: %w
• create Agy permission overlay: %w
• parse existing Agy hooks %s: %w

AI-assisted analysis of chenhg5/cc-connect@4000b2338a (2026-09-06). Data as JSON: /api/errors/5aa33e1e6c217eef. Report an issue: GitHub.