From fc48161910fc013674f4af9e19ffafd449db2cfd Mon Sep 17 00:00:00 2001
From: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
Date: Fri, 2 Dec 2016 16:30:11 -0200
Subject: [PATCH] eo: check for empty vtable and failed extensions.

if for some reason we fail to validate a class, then we should skip
that extension. This may result in an empty vtable, then check for
that and avoid a crash.

This is very unlike to happen in practice, but I've forced some
validation errors and could get to that.
---
 src/lib/eo/eo.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib/eo/eo.c b/src/lib/eo/eo.c
index ce28395d3f..71ef7155ca 100644
--- a/src/lib/eo/eo.c
+++ b/src/lib/eo/eo.c
@@ -1249,6 +1249,8 @@ efl_class_new(const Efl_Class_Description *desc, const Efl_Class *parent_id, ...
         while (extn_id)
           {
              extn = _eo_class_pointer_get((Efl_Class *)extn_id, __FUNCTION__, __FILE__, __LINE__);
+             if (!extn) /* did not validate */
+               continue;
              switch (extn->desc->type)
                {
                 case EFL_CLASS_TYPE_REGULAR_NO_INSTANT:
@@ -1412,6 +1414,7 @@ efl_class_new(const Efl_Class_Description *desc, const Efl_Class *parent_id, ...
      }
 
    /* Mark which classes we implement */
+   if (klass->vtable.size)
      {
         const _Efl_Class **extn_itr;