From 2ca8d8af2fac14174d59719cdc6d2c14a10dcc34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=CE=9D=CE=B9=CE=BA=CF=8C=CE=BB=CE=B1=CE=BF=CF=82-=CE=94?=
 =?UTF-8?q?=CE=B9=CE=B3=CE=B5=CE=BD=CE=AE=CF=82=20=CE=9A=CE=B1=CF=81=CE=B1?=
 =?UTF-8?q?=CE=B3=CE=B9=CE=AC=CE=BD=CE=BD=CE=B7=CF=82?=
 <digenishjkl@gmail.com>
Date: Wed, 30 Mar 2016 16:34:42 +0300
Subject: [PATCH] exception handling was hiding original exception

---
 parsel/selector.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/parsel/selector.py b/parsel/selector.py
index 151553ed..8d8c6939 100644
--- a/parsel/selector.py
+++ b/parsel/selector.py
@@ -2,6 +2,8 @@
 XPath selectors based on lxml
 """
 
+import sys
+
 import six
 from lxml import etree
 
@@ -175,9 +177,10 @@ def xpath(self, query):
         try:
             result = xpathev(query, namespaces=self.namespaces,
                              smart_strings=self._lxml_smart_strings)
-        except etree.XPathError:
-            msg = u"Invalid XPath: %s" % query
-            raise ValueError(msg if six.PY3 else msg.encode("unicode_escape"))
+        except etree.XPathError as exc:
+            msg = u"XPath error: %s in %s" % (exc, query)
+            msg = msg if six.PY3 else msg.encode('unicode_escape')
+            six.reraise(ValueError, ValueError(msg), sys.exc_info()[2])
 
         if type(result) is not list:
             result = [result]