gcController.totalAlloc.Add(slotsUsed * int64(s.elemsize))

			if s.sweepgen != sg+1 {
				// refill conservatively counted unallocated slots in gcController.heapLive.
				// Undo this.
				//
				// If this span was cached before sweep, then gcController.heapLive was totally
				// recomputed since caching this span, so we don't do this for stale spans.

    /*
     * TODO(cpovirk): `return (V) removedValue` once our checker permits that.
     *
     * (We promoted a class of warnings into errors because sometimes they indicate real problems.
     * But now we need to "undo" some instance of spurious errors, as discussed in
     * https://github.com/jspecify/checker-framework/issues/8.)
     */
    return removedValue == null ? null : (V) removedValue;
  }

  @Override

							pendingLines.add(v.Pos)
						}
						v.Op = OpCopy
						v.SetArgs1(nilCheck)
						continue
					}
					// Record the fact that we know ptr is non nil, and remember to
					// undo that information when this dominator subtree is done.
					nonNilValues[ptr.ID] = v
					work = append(work, bp{op: ClearPtr, ptr: ptr})
					fallthrough // a non-eliminated nil check might be a good place for a statement boundary.

    /*
     * TODO(cpovirk): `return (V) removedValue` once our checker permits that.
     *
     * (We promoted a class of warnings into errors because sometimes they indicate real problems.
     * But now we need to "undo" some instance of spurious errors, as discussed in
     * https://github.com/jspecify/checker-framework/issues/8.)
     */
    return removedValue == null ? null : (V) removedValue;
  }

  @Override

			return fmt.Errorf("bind mount to %q failed: %v", "/etc/nsswitch.conf", err)
		}
		return nil
	}

	executed := false
	// Once we call unshare(CLONE_NEWNS), we cannot undo it explicitly. Instead, we need to unshare on a specific thread,
	// then kill that thread when we are done (or rather, let Go runtime kill the thread).

	if c.timer != nil && async {
		c.timer.maybeRunChan()
	}
	if c.timer != nil && !async {
		// timer channels have a buffered implementation
		// but present to users as unbuffered, so that we can
		// undo sends without users noticing.
		return 0
	}
	return int(c.qcount)
}

func chancap(c *hchan) int {
	if c == nil {
		return 0
	}
	if c.timer != nil {
		async := debug.asynctimerchan.Load() != 0

	if offset != -4*60*60 {
		t.Fatalf("ParseInLocation(Feb 01 2013 AST, Blanc-Sablon).Zone = _, %d, want _, %d", offset, -4*60*60)
	}
}

func TestLoadLocationZipFile(t *testing.T) {
	undo := DisablePlatformSources()
	defer undo()

	_, err := LoadLocation("Australia/Sydney")
	if err != nil {
		t.Fatal(err)
	}
}

var rubyTests = []ParseTest{

		// names are given "middle dot" version numbers as part of the
		// writing them out to export data (see issue 4326). If DWARF
		// inlined routine generation is turned on, we want to undo
		// this versioning, since DWARF variables in question will be
		// parented by the inlined routine and not the top-level
		// caller.
		synthCount := len(m)
		for _, v := range sl {
			vp := varPos{

	stackcheck()
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	mp := getg().m
	lock(&mp.threadLock)
	if mp.thread != 0 {
		stdcall1(_CloseHandle, mp.thread)
		mp.thread = 0
	}
	unlock(&mp.threadLock)

	mp.procid = 0
}

// Called from exitm, but not from drop, to undo the effect of thread-owned

      mlir::mhlo::createFlattenTuplePass());

  mlir::odml::AddMhloOptimizationPasses(
      pass_manager,
      /*add_fold_broadcast_pass=*/pass_config.enable_stablehlo_quantizer);

  // Undo the MHLO::BroadcastInDimOp folding pattern on splat constants. This
  // pass must be added right before the legalization because pattern rewriter
  // driver applies folding by default.