Fix issue with PaperScript and array[i++] expressions.

src/core/PaperScript.js

@@ -137,6 +137,11 @@ var PaperScript = new function() {
 
 		// Recursively walks the AST and replaces the code of certain nodes
 		function walkAst(node) {
+			// array[i++] is a MemberExpression with computed = true.
+			// We cannot replace that with array[_$_(i, "+", 1)], as it would
+			// break the code, so let's bail out.
+			if (!node || node.type === 'MemberExpression' && node.computed)
+				return;
 			for (var key in node) {
 				if (key === 'range')
 					continue;

src/item/Raster.js

@@ -508,7 +508,7 @@ var Raster = Item.extend(/** @lends Raster# */{
 		return this.getContext().createImageData(size.width, size.height);
 	},
 
-	// DOCS: document Raster#getData
+	// DOCS: document Raster#getImageData
 	/**
 	 * @param {Rectangle} rect
 	 * @return {ImageData}