// Check that the color indexes are inside the palette.
	if len(m.Palette) < 256 {
		for _, pixel := range m.Pix {
			if int(pixel) >= len(m.Palette) {
				return errBadPixel
			}
		}
	}

	// Undo the interlacing if necessary.
	if d.imageFields&fInterlace != 0 {
		uninterlace(m)
	}

	if keepAllFrames || len(d.image) == 0 {
		d.image = append(d.image, m)
		d.delay = append(d.delay, d.delayTime)

					APIVersion: "v1",
					Kind:       "Node",
				},
				EventTime:           someTime,
				ReportingController: "k8s.io/my-controller",
				ReportingInstance:   "node-xyz",
				Action:              "Undo",
				Reason:              "Yeees",
				Type:                "Normal",
			},
			oldEvent: &core.Event{
				ObjectMeta: metav1.ObjectMeta{
					Name:            "test",

        if (expression != adjustedResolutionExpression) {
            // Type alias detection.
            //
            // If we adjusted resolution to get a constructor instead of a class, we need to undo that
            // if the class is defined as a type alias. We can detect that situation when the constructed type
            // is different from the return type of the constructor.
            //

	if isMust(typ) {
		if mask&typ != 0 {
			return score, mask
		}
		may := mustToMay(typ)
		if mask&may != 0 {
			// promote may to must, so undo may
			score -= adjValue(may)
			mask &^= may
		}
	} else if isMay(typ) {
		must := mayToMust(typ)
		if mask&(must|typ) != 0 {
			return score, mask
		}
	}
	if mask&typ == 0 {

		// via os.O_TRUNC. Truncating only after writing ensures that a second write
		// of the same content to the same file is idempotent, and does not — even
		// temporarily! — undo the effect of the first write.
		err = f.Truncate(int64(len(entry)))
	}
	if closeErr := f.Close(); err == nil {
		err = closeErr
	}
	if err != nil {

		start = start.next
	}
	s := d.free
	if s != nil {
		d.free = s.next
	} else {
		s = new(stack)
	}
	s.kind = stkEOF
	s.next = start.next
	start.next = s
}

// Undo a pushEOF.
// The element must have been finished, so the EOF should be at the top of the stack.
func (d *Decoder) popEOF() bool {
	if d.stk == nil || d.stk.kind != stkEOF {
		return false
	}
	d.pop()

 *  Fix: Don't crash when converting a `HttpUrl` instance with an unresolvable hostname to a URI.
    The new behavior strips invalid characters like `"` and `{` from the hostname before converting.

 *  Fix: Undo a performance regression introduced in OkHttp 4.0 caused by differences in behavior
    between Kotlin's `assert()` and Java's `assert()`. (Kotlin always evaluates the argument; Java
    only does when assertions are enabled.)

	// gen values are being used.
	//
	// Because we're doing this load again, it also means that the trace
	// might end up being disabled when we load it. In that case we need to undo
	// what we did and bail.
	gen := trace.gen.Load()
	if gen == 0 {
		mp.trace.seqlock.Add(1)
		releasem(mp)
		return traceLocker{}
	}
	return traceLocker{mp, gen}
}

		if old.vid == 0 { // checkpointBound
			break
		}
		if old.limit == noLimit {
			delete(ft.limits, old.vid)
		} else {
			ft.limits[old.vid] = old.limit
		}
	}
	ft.orderS.Undo()
	ft.orderU.Undo()
}

func lessByID(v, w *Value) bool {
	if v == nil && w == nil {
		// Should not happen, but just in case.
		return false
	}
	if v == nil {
		return true
	}

		//
		// In the case where a Go call originates from C, ncgo is 0
		// and there is no matching cgocall to end.
		if mp.ncgo > 0 {
			mp.incgo = false
			mp.ncgo--
			osPreemptExtExit(mp)
		}

		// Undo the call to lockOSThread in cgocallbackg, only on the
		// panicking path. In normal return case cgocallbackg will call
		// unlockOSThread, ensuring no preemption point after the unlock.