[Bug libstdc++/53984] iostream operation throwing exception when exceptions not enabled

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53984

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Sep  4 16:52:25 2017
New Revision: 251675

URL: https://gcc.gnu.org/viewcvs?rev=251675&root=gcc&view=rev
Log:
PR libstdc++/53984 handle exceptions in basic_istream::sentry

Backport from mainline
2017-07-25  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/53984
        * include/bits/basic_ios.h (basic_ios::_M_setstate): Adjust comment.
        * include/bits/istream.tcc (basic_istream::sentry): Handle exceptions
        during construction.
        * include/std/istream: Adjust comments for formatted input functions
        and unformatted input functions.
        * testsuite/27_io/basic_fstream/53984.cc: New.
        * testsuite/27_io/basic_istream/sentry/char/53984.cc: New.

Added:
    branches/gcc-6-branch/libstdc++-v3/testsuite/27_io/basic_fstream/53984.cc
   
branches/gcc-6-branch/libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/53984.cc
Modified:
    branches/gcc-6-branch/libstdc++-v3/ChangeLog
    branches/gcc-6-branch/libstdc++-v3/include/bits/basic_ios.h
    branches/gcc-6-branch/libstdc++-v3/include/bits/istream.tcc
    branches/gcc-6-branch/libstdc++-v3/include/std/istream