[FIX] len cannot exceed maximal Array length

lib/index.js

@@ -44,7 +44,7 @@ var isNumber = require( 'validate.io-number-primitive' );
 * @returns {Array} linearly spaced numeric array
 */
 function incrspace( x1, x2, inc ) {
-	var arr, len, i;
+	var arr, len, i, maxLength;
 	if ( !isNumber( x1 ) ) {
 		throw new TypeError( 'incrspace()::invalid input argument. Start must be numeric. Value: `' + x1 + '`.' );
 	}
@@ -60,6 +60,12 @@ function incrspace( x1, x2, inc ) {
 	}
 	// Calculate the array length:
 	len = Math.ceil( ( x2-x1 ) / inc );
+
+	maxLength = Math.pow(2,32) - 1;
+	if ( len >= maxLength ) {
+		throw new RangeError( 'incrspace()::invalid input arguments. (start - stop) / increment exceeds maximum Array length.' );
+	}
+
 	if ( len < 0 ) {
 		return [ x1 ];
 	}

test/test.js

@@ -93,6 +93,26 @@ describe( 'compute-incrspace', function tests() {
 		}
 	});
 
+	it( 'should throw an error if the maximum Array length is exceeded', function test() {
+
+		var values = [
+			0.000000000000001,
+			0.00000000000000000000001,
+			0.000000000000000000000000001,
+			0
+		];
+
+		for ( var i = 0; i < values.length; i++ ) {
+			expect( badValue( values[i] ) ).to.throw( RangeError );
+		}
+
+		function badValue( value ) {
+			return function() {
+				incrspace( 0, 10, value );
+			};
+		}
+	});
+
 	it( 'should return a linearly spaced array', function test() {
 		var start, stop, expected, actual;