From 76417cc3c18b4d8e0bab961579285010a14fe83d Mon Sep 17 00:00:00 2001
From: Bet4 <16643669+bet4it@users.noreply.github.com>
Date: Sun, 16 Dec 2018 01:37:29 +0800
Subject: [PATCH] Fix environment cache regression (#1238)

The only remaining issue with this PR is that it does compare with executable instead of _start_executable (they don't need to be the same).
---
 jedi/api/environment.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jedi/api/environment.py b/jedi/api/environment.py
index 2bf6f68a..ea34d90b 100644
--- a/jedi/api/environment.py
+++ b/jedi/api/environment.py
@@ -190,8 +190,9 @@ def get_default_environment():
 
 
 def get_cached_default_environment():
+    var = os.environ.get('VIRTUAL_ENV')
     environment = _get_cached_default_environment()
-    if environment.path != os.environ.get('VIRTUAL_ENV'):
+    if var and var != environment.path:
         _get_cached_default_environment.clear_cache()
         return _get_cached_default_environment()
     return environment