Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().

diff --cc Misc/NEWS
index 78d55ea81bcbdbd9d1ff861041537f01588459de,56ebe918fc43c7ae7788299255d3859926045e31..b9b2f487aa6517d5f31f086a664dfe13a548ee48
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,9 -12,8 +10,11 @@@ What's New in Python 3.4.0 Alpha 1
  Core and Builtins
  -----------------
  
+ - Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
+ 
 +- Issue #18342: Use the repr of a module name when an import fails when using
 +  ``from ... import ...``.
 +
  - Issue #17872: Fix a segfault in marshal.load() when input stream returns
    more bytes than requested.
  

diff --cc Modules/_io/bufferedio.c
Simple merge