Improved the lxml tree builder's handling of processing

  instructions. [bug=1294645]

1 files changed, 9 insertions, 2 deletions

diff --git a/bs4/builder/_lxml.py b/bs4/builder/_lxml.py
index 978c8df..b0bc8a0 100644
--- a/bs4/builder/_lxml.py
+++ b/bs4/builder/_lxml.py
@@ -7,7 +7,12 @@ from io import BytesIO
 from StringIO import StringIO
 import collections
 from lxml import etree
-from bs4.element import Comment, Doctype, NamespacedAttribute
+from bs4.element import (
+    Comment,
+    Doctype,
+    NamespacedAttribute,
+    ProcessingInstruction,
+)
 from bs4.builder import (
     FAST,
     HTML,
@@ -191,7 +196,9 @@ class LXMLTreeBuilderForXML(TreeBuilder):
             self.nsmaps.pop()
 
     def pi(self, target, data):
-        pass
+        self.soup.endData()
+        self.soup.handle_data(target + ' ' + data)
+        self.soup.endData(ProcessingInstruction)
 
     def data(self, content):
         self.soup.handle_data(content)