diff mercurial/bundle2.py @ 29759:e584c6235500

py3: conditionalize the raise statement

raise E,V,T is not acceptable in Python 3, thats is conditionalized.
Moreover this will result in syntax error so we have to use exec() to
execute this. Related PEP- https://www.python.org/dev/peps/pep-3109/#id14

My implementation is motivated from the six implementation except they are
defining a new function exec_() to prevent adding an extra frame AFAIK :)

https://bitbucket.org/gutworth/six/src/ca4580a5a648/six.py#six.py-680

--- a/mercurial/bundle2.py	Tue Aug 09 09:02:51 2016 +0000
+++ b/mercurial/bundle2.py	Mon Aug 08 23:51:11 2016 +0530
@@ -989,7 +989,10 @@
             outdebug(ui, 'closing payload chunk')
             # abort current part payload
             yield _pack(_fpayloadsize, 0)
-            raise exc_info[0], exc_info[1], exc_info[2]
+            if sys.version_info[0] >= 3:
+                raise exc_info[0](exc_info[1]).with_traceback(exc_info[2])
+            else:
+                exec("""raise exc_info[0], exc_info[1], exc_info[2]""")
         # end of payload
         outdebug(ui, 'closing payload chunk')
         yield _pack(_fpayloadsize, 0)