--- a/.hgtags	Wed Dec 09 18:42:13 2015 +0100
+++ b/.hgtags	Tue Dec 15 11:41:25 2015 +0100
@@ -508,6 +508,9 @@
 c44930ac9579fe4d526b26892954e56021af18be 3.20.11
 c44930ac9579fe4d526b26892954e56021af18be debian/3.20.11-1
 c44930ac9579fe4d526b26892954e56021af18be centos/3.20.11-1
+03e8fc9f79a6e489a1b5c695eb0cd3fbb1afe9d4 3.20.12
+03e8fc9f79a6e489a1b5c695eb0cd3fbb1afe9d4 debian/3.20.12-1
+03e8fc9f79a6e489a1b5c695eb0cd3fbb1afe9d4 centos/3.20.12-1
 887c6eef807781560adcd4ecd2dea9011f5a6681 3.21.0
 887c6eef807781560adcd4ecd2dea9011f5a6681 debian/3.21.0-1
 887c6eef807781560adcd4ecd2dea9011f5a6681 centos/3.21.0-1

--- a/dataimport/pgstore.py	Wed Dec 09 18:42:13 2015 +0100
+++ b/dataimport/pgstore.py	Tue Dec 15 11:41:25 2015 +0100
@@ -64,8 +64,9 @@
                                columns, encoding='utf-8'):
     """ Execute thread with copy from
     """
-    buf = _create_copyfrom_buffer(data, columns, encoding=encoding)
-    if buf is None:
+    try:
+        buf = _create_copyfrom_buffer(data, columns, encoding=encoding)
+    except ValueError:
         _execmany_thread_not_copy_from(cu, statement, data)
     else:
         if columns is None:

--- a/debian/changelog	Wed Dec 09 18:42:13 2015 +0100
+++ b/debian/changelog	Tue Dec 15 11:41:25 2015 +0100
@@ -22,6 +22,12 @@
 
  -- Julien Cristau <julien.cristau@logilab.fr>  Fri, 10 Jul 2015 17:04:11 +0200
 
+cubicweb (3.20.12-1) unstable; urgency=medium
+
+  * new upstream release.
+
+ -- Julien Cristau <julien.cristau@logilab.fr>  Mon, 14 Dec 2015 16:28:52 +0100
+
 cubicweb (3.20.11-1) unstable; urgency=medium
 
   * New upstream release.

--- a/web/views/schema.py	Wed Dec 09 18:42:13 2015 +0100
+++ b/web/views/schema.py	Tue Dec 15 11:41:25 2015 +0100
@@ -657,10 +657,13 @@
                                               }))
         # svg image file
         fd, tmpfile = tempfile.mkstemp('.svg')
-        os.close(fd)
-        generator.generate(visitor, prophdlr, tmpfile)
-        with codecs.open(tmpfile, 'rb', encoding='utf-8') as svgfile:
-            self.w(svgfile.read())
+        try:
+            os.close(fd)
+            generator.generate(visitor, prophdlr, tmpfile)
+            with codecs.open(tmpfile, 'rb', encoding='utf-8') as svgfile:
+                self.w(svgfile.read())
+        finally:
+            os.unlink(tmpfile)
 
 # breadcrumbs ##################################################################