Print a critical warning when attempting to mix Python versions

This prevents people from trying to load python3 plugins using
a python2 program and vice versa.

1 files changed, 14 insertions, 0 deletions

diff --git a/loaders/python/peas-plugin-loader-python.c b/loaders/python/peas-plugin-loader-python.c
index b7a5881..f59a0bc 100644
--- a/loaders/python/peas-plugin-loader-python.c
+++ b/loaders/python/peas-plugin-loader-python.c
@@ -371,6 +371,7 @@ static gboolean
 peas_plugin_loader_python_initialize (PeasPluginLoader *loader)
 {
   PeasPluginLoaderPython *pyloader = PEAS_PLUGIN_LOADER_PYTHON (loader);
+  long hexversion;
   PyObject *mdict, *gettext, *install, *gettext_args;
   const gchar *prgname;
 #if PY_VERSION_HEX < 0x03000000
@@ -412,6 +413,19 @@ peas_plugin_loader_python_initialize (PeasPluginLoader *loader)
       pyloader->priv->must_finalize_python = TRUE;
     }
 
+  hexversion = PyLong_AsLong (PySys_GetObject ((char *) "hexversion"));
+
+#if PY_VERSION_HEX < 0x03000000
+  if (hexversion >= 0x03000000)
+#else
+  if (hexversion < 0x03000000)
+#endif
+    {
+      g_critical ("Attempting to mix incompatible Python versions");
+
+      goto python_init_error;
+    }
+
   prgname = g_get_prgname ();
   prgname = prgname == NULL ? "" : prgname;