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[Bug libstdc++/81395] [5/6/7/8 Regression] basic_filebuf::overflow recurses and overflows stack
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 18 Jul 2017 23:40:06 +0000
- Subject: [Bug libstdc++/81395] [5/6/7/8 Regression] basic_filebuf::overflow recurses and overflows stack
- Auto-submitted: auto-generated
- References: <bug-81395-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81395
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Jul 18 23:39:34 2017
New Revision: 250328
URL: https://gcc.gnu.org/viewcvs?rev=250328&root=gcc&view=rev
Log:
PR libstdc++/81395 fix crash when write follows large read
PR libstdc++/81395
* include/bits/fstream.tcc (basic_filebuf::xsgetn): Don't set buffer
pointers for write mode after reading.
* testsuite/27_io/basic_filebuf/sgetn/char/81395.cc: New.
Added:
trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/81395.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/fstream.tcc