Prevent NoSuchElementException when adding error

Author: jmaroeder

src/main/java/com/hubspot/jinjava/interpret/JinjavaInterpreter.java

@@ -694,7 +694,10 @@ public void addError(TemplateError templateError) {
     }
     // fix line numbers not matching up with source template
     if (!context.getCurrentPathStack().isEmpty()) {
-      if (!templateError.getSourceTemplate().isPresent()) {
+      if (
+        !templateError.getSourceTemplate().isPresent() &&
+        context.getCurrentPathStack().peek().isPresent()
+      ) {
         templateError.setMessage(
           getWrappedErrorMessage(
             context.getCurrentPathStack().peek().get(),