Exiting with 1 when Exception::getCode() returns non-integer values.

From php.net/exception.getcode
> Returns the exception code as integer in Exception but possibly as other type in Exception descendants (for example as string in PDOException).

lib/Cake/Console/ConsoleErrorHandler.php

@@ -58,7 +58,9 @@ class ConsoleErrorHandler {
 			$exception->getMessage(),
 			$exception->getTraceAsString()
 		));
-		return $this->_stop($exception->getCode() ? $exception->getCode() : 1);
+		$code = $exception->getCode();
+		$code = ($code && is_integer($code)) ? $code : 1;
+		return $this->_stop($code);
 	}
 
 /**

lib/Cake/Test/Case/Console/ConsoleErrorHandlerTest.php

@@ -147,4 +147,31 @@ class ConsoleErrorHandlerTest extends CakeTestCase {
 		$this->Error->handleException($exception);
 	}
 
+/**
+ * test a exception with non-integer code
+ *
+ * @return void
+ */
+	public function testNonIntegerExceptionCode() {
+		if (PHP_VERSION_ID < 50300) {
+			$this->markTestSkipped('ReflectionProperty::setAccessible() is available since 5.3');
+		}
+
+		$exception = new Exception('Non-integer exception code');
+
+		$class = new ReflectionClass('Exception');
+		$property = $class->getProperty('code');
+		$property->setAccessible(true);
+		$property->setValue($exception, '42S22');
+
+		ConsoleErrorHandler::$stderr->expects($this->once())->method('write')
+			->with($this->stringContains('Non-integer exception code'));
+
+		$this->Error->expects($this->once())
+			->method('_stop')
+			->with(1);
+
+		$this->Error->handleException($exception);
+	}
+
 }