t.Fatalf("converted event did not validate; event: \n%s\nerror: %s", ev, err)
				}

				if testName == "user_task_region_1_21_good" {
					testedUserRegions = true
					validRegions := map[string]struct{}{
						"post-existing region": struct{}{},
						"region0":              struct{}{},
						"region1":              struct{}{},
					}
					// Check that we correctly convert user regions. These

	"internal/trace/version"
)

// TextReader parses a text format trace with only very basic validation
// into an event stream.
type TextReader struct {
	v     version.Version
	specs []event.Spec
	names map[string]event.Type
	s     *bufio.Scanner
}

// NewTextReader creates a new reader for the trace text format.
func NewTextReader(r io.Reader) (*TextReader, error) {
	tr := &TextReader{s: bufio.NewScanner(r)}

	t.Parallel()

	exe, err := buildTestProg(t, "testprogcgo")
	if err != nil {
		t.Fatal(err)
	}

	wantLogs := []string{
		"goCalledFromC",
		"goCalledFromCThread",
	}
	logs := make(map[string]*trace.Event)
	for _, category := range wantLogs {
		logs[category] = nil
	}
	for _, tracefpunwindoff := range []int{1, 0} {
		env := fmt.Sprintf("GODEBUG=tracefpunwindoff=%d", tracefpunwindoff)

	"strings"
)

// files to handle
type work struct {
	// absolute file names
	countfiles []string // count files to process
	readyfiles []string // old reports to upload
	// relative names
	uploaded map[string]bool // reports that have been uploaded
}

// find all the files that look like counter files or reports
// that need to be uploaded. (There may be unexpected leftover files

		expr, err := parser.ParseExprFrom(fset, "eval", str, 0)
		if err != nil {
			return nil, err
		}

		info := &Info{
			Uses:       make(map[*ast.Ident]Object),
			Selections: make(map[*ast.SelectorExpr]*Selection),
		}
		if err := CheckExpr(fset, pkg, pos, expr, info); err != nil {
			return nil, fmt.Errorf("CheckExpr(%q) failed: %s", str, err)
		}
		switch expr := expr.(type) {

// license that can be found in the LICENSE file.

// Trace string management.

package runtime

// Trace strings.

const maxTraceStringLen = 1024

// traceStringTable is map of string -> unique ID that also manages
// writing strings out into the trace.
type traceStringTable struct {
	// lock protects buf.
	lock mutex
	buf  *traceBuf // string batches to write out to the trace.

	// ResultOf provides the inputs to this analysis pass, which are
	// the corresponding results of its prerequisite analyzers.
	// The map keys are the elements of Analysis.Required,
	// and the type of each corresponding value is the required
	// analysis's ResultType.
	ResultOf map[*Analyzer]interface{}

	// ReadFile returns the contents of the named file.
	//
	// The only valid file names are the elements of OtherFiles

// by treating them as an addition (e.g., Bits{5, 5} => Bits{6}), and it sorts
// the result list for reproducible results.
func (x Bits) norm() Bits {
	m := make(map[int]bool)
	for _, b := range x {
		for m[b] {
			m[b] = false
			b++
		}
		m[b] = true
	}
	var z Bits
	for b, set := range m {
		if set {
			z = append(z, b)
		}
	}
	slices.Sort([]int(z))

	// This would act as a max version on what a tool can support.
	return Future
}

// InitFileVersions initializes info to record Go versions for Go files.
func InitFileVersions(info *types.Info) {
	info.FileVersions = make(map[*ast.File]string)

	// the single test goroutine. Use labels to execute that filter: they should
	// apply to all work done while that goroutine is getg().m.curg, and they
	// should apply to no other goroutines.
	pprofStacks := make(map[string]int)
	for _, s := range prof.Sample {
		if s.Label["tracing"] != nil {
			var fns []string
			var leaf string
			for _, loc := range s.Location {
				for _, line := range loc.Line {