return validateDelegate(delegate.lineInFileLocation(path, line, column, length));
    }

    @Override
    public InternalProblemBuilder offsetInFileLocation(String path, int offset, int length) {
        return validateDelegate(delegate.offsetInFileLocation(path, offset, length));
    }

    @Override
    public InternalProblemBuilder pluginLocation(String pluginId) {
        return validateDelegate(delegate.pluginLocation(pluginId));
    }

        val caretPositions = testServices.expressionMarkerProvider.getAllCarets(mainFile).ifEmpty {
            testServices.expressionMarkerProvider.getSelectedRangeOrNull(mainFile)?.let {
                CaretMarker(tag = "", offset = it.startOffset)
            }.let(::listOfNotNull)
        }

        return collectElementsToResolve(caretPositions, mainFile)
    }

    protected fun collectElementsToResolve(

	RET
eq:
	MOVV	$1, R4
	RET

// memequal_varlen(a, b unsafe.Pointer) bool
TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT,$40-17
	BEQ	R4, R5, eq
	MOVV	8(REGCTXT), R6    // compiler stores size at offset 8 in the closure
	MOVV	R4, 8(R3)
	MOVV	R5, 16(R3)
	MOVV	R6, 24(R3)
	JAL	runtime·memequal(SB)
	MOVBU	32(R3), R4
	RET
eq:
	MOVV	$1, R4

	ctxt *obj.Link
	f    *ir.Func
}

func (TestFrontend) StringData(s string) *obj.LSym {
	return nil
}
func (d TestFrontend) SplitSlot(parent *LocalSlot, suffix string, offset int64, t *types.Type) LocalSlot {
	return LocalSlot{N: parent.N, Type: t, Off: offset}
}
func (d TestFrontend) Syslook(s string) *obj.LSym {
	return d.ctxt.Lookup(s)
}
func (TestFrontend) UseWriteBarrier() bool {
	return true // only writebarrier_test cares

func (d *naughtyDisk) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
	if err := d.calcError(); err != nil {
		return 0, err
	}
	return d.disk.ReadFile(ctx, volume, path, offset, buf, verifier)
}

func (d *naughtyDisk) ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error) {
	if err := d.calcError(); err != nil {

        val carets = testServices.expressionMarkerProvider.getAllCarets(mainFile)
        carets.flatMap { findReferencesAtCaret(mainFile, it.offset) }.forEach { reference ->
            val resolved = reference.resolve() ?: testServices.assertions.fail { "Could not resolve reference at caret" }
            testServices.assertions.assertTrue(reference.isReferenceTo(resolved))

	// Open opens the named object file. If the object is a shared
	// library, start/limit/offset are the addresses where it is mapped
	// into memory in the address space being inspected. If the object
	// is a linux kernel, relocationSymbol is the name of the symbol
	// corresponding to the start address.
	Open(file string, start, limit, offset uint64, relocationSymbol string) (ObjFile, error)

type inlinedCall struct {
	funcID    abi.FuncID // type of the called function
	_         [3]byte
	nameOff   int32 // offset into pclntab for name of called function
	parentPc  int32 // position of an instruction whose source position is the call site (offset from entry)
	startLine int32 // line number of start of function (func keyword/TEXT directive)
}

	ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error)
	AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error)
	CreateFile(ctx context.Context, origvolume, olume, path string, size int64, reader io.Reader) error
	ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error)

	// Process each line.
	text := fullText
	inStar := false
	for text != "" {
		offset := len(fullText) - len(text)
		var line string
		line, text, _ = strings.Cut(text, "\n")

		if !inStar && strings.HasPrefix(line, "//") {
			check.comment(pos+token.Pos(offset), line)
			continue
		}

		// Skip over, cut out any /* */ comments,