Core: Show console error for mismatched column count. See #1415

js/jquery.tablesorter.js

@@ -2275,9 +2275,42 @@
 					}
 				}
 			}
+			ts.checkColumnCount($rows, matrix, matrixrow.length);
 			return matrixrow.length;
 		},
 
+		checkColumnCount : function($rows, matrix, columns) {
+			// this DOES NOT report any tbody column issues, except for the math and
+			// and column selector widgets
+			var i, len,
+				valid = true,
+				cells = [];
+			for ( i = 0; i < matrix.length; i++ ) {
+				// some matrix entries are undefined when testing the footer because
+				// it is using the rowIndex property
+				if ( matrix[i] ) {
+					len = matrix[i].length;
+					if ( matrix[i].length !== columns ) {
+						valid = false;
+						break;
+					}
+				}
+			}
+			if ( !valid ) {
+				$rows.each( function( indx, el ) {
+					var cell = el.parentElement.nodeName;
+					if ( cells.indexOf( cell ) ) {
+						cells.push( cell );
+					}
+				});
+				console.error(
+					'Invalid or incorrect number of columns in the ' +
+					cells.join( ' or ' ) + '; expected ' + columns +
+					', but found ' + len + ' columns'
+				);
+			}
+		},
+
 		// automatically add a colgroup with col elements set to a percentage width
 		fixColumnWidth : function( table ) {
 			table = $( table )[ 0 ];