RSRP-289031: JavaScript refactor Introduce variable action fails

In JavaScript editor, VS freezes for a minute or so when trying to 'Introduce Variable' (Ctrl+Alt+V). No code change then. (BTW, where can I find reSharper's .log file for the error details?)

Source code causing the problem (tried to create var for this.options in the show() method):

$.widget(namespace + "." + widgetName, {
	options: {
		tooltipClass: "",
		stripSelector: ".ipOverflowTooltipStrip",
		showDelay: 150,
		onShow: null
	},
	
	// ....

	show: function (e) {
		var target = e.target;

		// if hovering the tooltip, do nothing
		if ((current !== null && current.tooltip[0] === target) || target.is(".ipOverflowTooltip"))
			return;

		this.hide();

		var tw = target.textWidth(),
			w = target.width();

		if (tw > w) {
			var clone = target.clone();
			var off = target.offset/*position*/();

			clone
				.addClass("ipOverflowTooltip")
				.css({
					display: "block",
					position: "absolute",
					top: off.top,
					left: off.left,
					zIndex: getZindex(target) + 456,
					backgroundColor: getBg(target) || "#ffffff",
					opacity: animationPerformance ? 0 : 1
				});

			copyStyle(target, clone);

			if (this.options.tooltipClass)
				clone.addClass(this.options.tooltipClass);

			if (this.options.stripSelector) {
				$(this.options.stripSelector, clone).remove();
				tw = target.textWidth();
				if (tw <= w) {
					clone.remove();
					return;
				}
			}

			var that = this;

			clone
				.height(target.height())
			//.width(tw + 6) // TODO: get rid of this magic number
				.appendTo("body")
				.on({
					mouseout: function () {
						that.hide();
					},
					click: function (cE) {
						target.click();
						cE.stopImmediatePropagation();
						return false;
					}
				});

			if (this.options.onShow) {
				if (this.options.onShow() === false) {
					this.hide();
					return;
				}
			}

			current = this;
			this.tooltip = clone;

			clone.animate({ opacity: 1 }, animationPerformance ? this.options.showDelay : 0);
		}
	}
	
	// ....
});

Thanks