bpo-28953: Use raise from when raising new IncompleteRead (GH-29861)

Automerge-Triggered-By: GH:asvetlov
2021-12-07 08:10:49 +08:00 · 2021-12-07 08:10:49 +08:00 · c5c365220e
commit c5c365220e
parent b7ef27bc08
1 changed files with 2 additions and 2 deletions
--- a/Lib/http/client.py
+++ b/Lib/http/client.py
@ -593,8 +593,8 @@ class HTTPResponse(io.BufferedIOBase):
                    amt -= chunk_left
                self.chunk_left = 0
            return b''.join(value)
-        except IncompleteRead:
-            raise IncompleteRead(b''.join(value))
+        except IncompleteRead as exc:
+            raise IncompleteRead(b''.join(value)) from exc

    def _readinto_chunked(self, b):
        assert self.chunked != _UNKNOWN