b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.
	b1 := g.Batch(trace.ThreadID(1), 0)
	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)
	b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), go122.GoRunning)

	t3.End()
	trace.Stop()
	t2.End()
	t0.End()
}

func do(ctx context.Context, k int) {
	trace.Log(ctx, "log", "before do")

	var t *trace.Task
	ctx, t = trace.NewTask(ctx, "do")
	defer t.End()

	trace.Log(ctx, "log2", "do")

	// Create a region and spawn more tasks and more workers.
	trace.WithRegion(ctx, "fanout", func() {
		for i := 0; i < k; i++ {
			go func(i int) {

    else -> "$kind '$name' of '${taskPathFrom(trace)}'"
}


fun taskPathFrom(trace: PropertyTrace): String =
    trace.sequence.filterIsInstance<PropertyTrace.Task>().first().path


fun projectPathFrom(trace: PropertyTrace): String =
    trace.sequence.filterIsInstance<PropertyTrace.Project>().first().path


fun firstTypeFrom(trace: PropertyTrace): Class<*> =
    trace.sequence.mapNotNull { typeFrom(it) }.first()


private

package main

import (
	"fmt"
	"internal/trace"
	"internal/trace/traceviewer"
	"time"
)

// viewerFrames returns the frames of the stack of ev. The given frame slice is
// used to store the frames to reduce allocations.
func viewerFrames(stk trace.Stack) []*trace.Frame {
	var frames []*trace.Frame
	stk.Frames(func(f trace.StackFrame) bool {
		frames = append(frames, &trace.Frame{
			PC:   f.PC,
			Fn:   f.Func,

                    }

                    PropertyKind.PropertyUsage -> {
                        property("kind", trace.kind.name)
                        comma()
                        property("name", trace.name)
                        comma()
                        property("from", projectPathFrom(trace.trace))
                    }

                    else -> {

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	g := t.Generation(1)

	// Steal proc from a goroutine that's been blocked
	// in a syscall the entire generation.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcSyscallAbandoned)

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	t.DisableTimestamps()

	g := t.Generation(1)

	// A goroutine execute a syscall and steals its own P, then starts running
	// on that P.
	b0 := g.Batch(trace.ThreadID(0), 0)

}

func mustFindLogV2(t *testing.T, trc io.Reader, category string) trace.Event {
	r, err := trace.NewReader(trc)
	if err != nil {
		t.Fatalf("bad trace: %v", err)
	}
	var candidates []trace.Event
	for {
		ev, err := r.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			t.Fatalf("failed to parse trace: %v", err)
		}
		if ev.Kind() == trace.EventLog && ev.Log().Category == category {

	systemstack(func() {
		lock(&trace.lock)
		if w.traceBuf != nil {
			traceBufFlush(w.traceBuf, w.gen)
		}
		if trace.empty != nil {
			w.traceBuf = trace.empty
			trace.empty = w.traceBuf.link
			unlock(&trace.lock)
		} else {
			unlock(&trace.lock)
			w.traceBuf = (*traceBuf)(sysAlloc(unsafe.Sizeof(traceBuf{}), &memstats.other_sys))
			if w.traceBuf == nil {
				throw("trace: out of memory")
			}
		}
	})

			// ignored for now
		default:
			panic("unreachable")
		}
	}

	if check.conf._Trace {
		check.trace(obj.Pos(), "## cycle detected: objPath = %s->%s (len = %d)", pathString(cycle), obj.Name(), len(cycle))
		if tparCycle {
			check.trace(obj.Pos(), "## cycle contains: generic type in a type parameter list")
		} else {
			check.trace(obj.Pos(), "## cycle contains: %d values, %d type definitions", nval, ndef)
		}
		defer func() {