// going until we definitely hit the end. If we see a "?" in the
			// middle of unwinding, that's a real problem.
			//
			// TODO: If we ever have function end information, use that to make
			// this robust.
			continue
		}
		for ; uf.valid(); uf = u.next(uf) {
			file, line := u.fileLine(uf)
			const wantFile = "symtabinl_test.go"
			if !stringslite.HasSuffix(file, wantFile) {

        TODO change this so that we extract all the information at compile time.

        At the moment we use the transform to:

        1. validate/restrict the syntax
        2. transform rules into something more robust (e.g. foo.bar.baz {} into configure("foo.bar.baz", {})) - no dynamic propertyMissing() nonsense
        3. hoist out input references (i.e. $()) into an annotation on rule closure classes to make available

	if len(line) > 0 && line[0] == '{' {
		// Plausible test2json output. Parse it generically.
		//
		// We go to some effort here to preserve key order while doing this
		// generically. This will stay robust to changes in the test2json
		// struct, or other additions outside of it. If humans are ever looking
		// at the output, it's really nice to keep field order because it
		// preserves a lot of regularity in the output.

}

func TestSetString(t *testing.T) {
	matches(t, Set{"x": "y"}, "x=y")
	matches(t, Set{"foo": "bar"}, "foo=bar")
	matches(t, Set{"foo": "bar", "baz": "qup"}, "baz=qup,foo=bar")

	// TODO: Make our label representation robust enough to handle labels
	// with ",=!" characters in their names.
}

func TestLabelHas(t *testing.T) {
	labelHasTests := []struct {
		Ls  Labels
		Key string
		Has bool
	}{
		{Set{"x": "y"}, "x", true},

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## More info

	b     *Block
	index int // index is the number of successor edges of b that have already been explored.
}

// postorderWithNumbering provides a DFS postordering.
// This seems to make loop-finding more robust.
func postorderWithNumbering(f *Func, ponums []int32) []*Block {
	seen := f.Cache.allocBoolSlice(f.NumBlocks())
	defer f.Cache.freeBoolSlice(seen)

	// result ordering
	order := make([]*Block, 0, len(f.Blocks))

   */
  private static long timeoutSeconds() {
    // This class can make no hard guarantees.  The methods in this class are inherently flaky, but
    // we try hard to make them robust in practice.  We could additionally try to add in a system
    // load timeout multiplier.  Or we could try to use a CPU time bound instead of wall clock time

//   not implemented by us, you will get a run-time failure.  In that
//   case, please try to rewrite your regular expression within the
//   above syntax.
//
//   This implementation is *not* meant to be as highly tuned or robust
//   as a compiled regex library, but should perform well enough for a
//   death test, which already incurs significant overhead by launching
//   a child process.
//
// Known caveats:
//

   */
  private static long timeoutSeconds() {
    // This class can make no hard guarantees.  The methods in this class are inherently flaky, but
    // we try hard to make them robust in practice.  We could additionally try to add in a system
    // load timeout multiplier.  Or we could try to use a CPU time bound instead of wall clock time