Fixed error guessing for nested templates

lib/Twig/Template.php

@@ -255,7 +255,14 @@ abstract class Twig_Template implements Twig_TemplateInterface
 
             return $this->env->loadTemplate($template, $index);
         } catch (Twig_Error $e) {
-            $e->setTemplateFile($templateName ? $templateName : $this->getTemplateName());
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($templateName ? $templateName : $this->getTemplateName());
+            }
+
+            if ($e->getTemplateLine()) {
+                throw $e;
+            }
+
             if (!$line) {
                 $e->guess();
             } else {

test/Twig/Tests/Fixtures/exceptions/syntax_error_in_reused_template.test

@@ -0,0 +1,10 @@
+--TEST--
+Exception for syntax error in reused template
+--TEMPLATE--
+{% use 'foo.twig' %}
+--TEMPLATE(foo.twig)--
+{% block bar %}
+    {% do node.data = 5 %}
+{% endblock %}
+--EXCEPTION--
+Twig_Error_Syntax: Unexpected token "operator" of value "=" ("end of statement block" expected) in "foo.twig" at line 3