replaced simple string errors with full Errors, in order to make debugging easier.

lib/ace/ace.js

@@ -75,7 +75,7 @@ exports.edit = function(el) {
         var _id = el;
         var el = document.getElementById(_id);
         if (!el)
-            throw "ace.edit can't find div #" + _id;
+            throw new Error("ace.edit can't find div #" + _id);
     }
 
     if (el.env && el.env.editor instanceof Editor)

lib/ace/edit_session/fold.js

@@ -78,7 +78,7 @@ oop.inherits(Fold, RangeList);
             return;
 
         if (!this.range.containsRange(fold))
-            throw "A fold can't intersect already existing fold" + fold.range + this.range;
+            throw new Error("A fold can't intersect already existing fold" + fold.range + this.range);
 
         // transform fold to local coordinates
         consumeRange(fold, this.start);
@@ -104,7 +104,7 @@ oop.inherits(Fold, RangeList);
         var afterEnd = this.subFolds[j];
 
         if (cmp == 0)
-            throw "A fold can't intersect already existing fold" + fold.range + this.range;
+            throw new Error("A fold can't intersect already existing fold" + fold.range + this.range);
 
         var consumedFolds = this.subFolds.splice(i, j - i, fold);
         fold.setFoldLine(this.foldLine);

lib/ace/edit_session/fold_line.js

@@ -71,7 +71,7 @@ function FoldLine(foldData, folds) {
     this.addFold = function(fold) {
         if (fold.sameRow) {
             if (fold.start.row < this.startRow || fold.endRow > this.endRow) {
-                throw "Can't add a fold to this FoldLine as it has no connection";
+                throw new Error("Can't add a fold to this FoldLine as it has no connection");
             }
             this.folds.push(fold);
             this.folds.sort(function(a, b) {
@@ -93,7 +93,7 @@ function FoldLine(foldData, folds) {
             this.start.row = fold.start.row;
             this.start.column = fold.start.column;
         } else {
-            throw "Trying to add fold to FoldRow that doesn't have a matching row";
+            throw new Error("Trying to add fold to FoldRow that doesn't have a matching row");
         }
         fold.foldLine = this;
     }

lib/ace/edit_session/folding.js

@@ -274,7 +274,7 @@ function Folding() {
         // --- Some checking ---
         if (!(startRow < endRow || 
             startRow == endRow && startColumn <= endColumn - 2))
-            throw "The range has to be at least 2 characters width";
+            throw new Error("The range has to be at least 2 characters width");
 
         var startFold = this.getFoldAt(startRow, startColumn, 1);
         var endFold = this.getFoldAt(endRow, endColumn, -1);
@@ -285,7 +285,7 @@ function Folding() {
             (startFold && !startFold.range.isStart(startRow, startColumn))
             || (endFold && !endFold.range.isEnd(endRow, endColumn))
         ) {
-            throw "A fold can't intersect already existing fold" + fold.range + startFold.range;
+            throw new Error("A fold can't intersect already existing fold" + fold.range + startFold.range);
         }
 
         // Check if there are folds in the range we create the new fold for.

lib/ace/edit_session_test.js

@@ -937,7 +937,7 @@ module.exports = {
                 fail = true;
             }
             if (fail != shouldFail) {
-                throw "Expected to get an exception";
+                throw new Error("Expected to get an exception");
             }
         }
 

lib/ace/ext/textarea.js

@@ -74,7 +74,7 @@ function applyStyles(elm, styles) {
 
 function setupContainer(element, getValue) {
     if (element.type != 'textarea') {
-        throw "Textarea required!";
+        throw new Error("Textarea required!");
     }
 
     var parentNode = element.parentNode;