go-delve/delve · error

could not clear CPU trap flag

Error message

could not clear CPU trap flag

What it means

Error "could not clear CPU trap flag" thrown in go-delve/delve.

Source

Thrown at pkg/proc/native/threads_darwin.go:70

func (procgrp *processGroup) singleStep(t *nativeThread) error {
	kret := C.single_step(t.os.threadAct)
	if kret != C.KERN_SUCCESS {
		return fmt.Errorf("could not single step")
	}
	for {
		twthread, err := t.dbp.trapWait(t.dbp.pid)
		if err != nil {
			return err
		}
		if twthread.ID == t.ID {
			break
		}
	}

	kret = C.clear_trap_flag(t.os.threadAct)
	if kret != C.KERN_SUCCESS {
		return fmt.Errorf("could not clear CPU trap flag")
	}
	return nil
}

func (t *nativeThread) resume() error {
	// TODO(dp) set flag for ptrace stops
	var err error
	t.dbp.execPtraceFunc(func() { err = ptraceCont(t.dbp.pid, 0) })
	if err == nil {
		return nil
	}
	kret := C.resume_thread(t.os.threadAct)
	if kret != C.KERN_SUCCESS {
		return ErrContinueThread
	}
	return nil
}

View on GitHub (pinned to a23773e6c3)

When it happens

Trigger: Thrown at pkg/proc/native/threads_darwin.go:70 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-delve/delve@a23773e6c3 (2026-08-31). Data as JSON: /api/errors/b6514677c580745f. Report an issue: GitHub.