From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-486060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 100377 invoked by alias); 12 May 2015 08:13:28 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 100276 invoked by uid 48); 12 May 2015 08:13:24 -0000
From: "lixin.fnst at cn dot fujitsu.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59224] [4.7/4.8/4.9 Regression] std::uncaught_exception returns true while constructing exception.
Date: Tue, 12 May 2015 08:13:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 4.8.1
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: lixin.fnst at cn dot fujitsu.com
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: FIXED
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: jason at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.7.4
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-59224-4-jeX7gjS17E@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-59224-4@http.gcc.gnu.org/bugzilla/>
References: <bug-59224-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-05/txt/msg00900.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59224

li xin <lixin.fnst at cn dot fujitsu.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lixin.fnst at cn dot fujitsu.com

--- Comment #8 from li xin <lixin.fnst at cn dot fujitsu.com> ---
(In reply to Jason Merrill from comment #5)
> Fixed for 4.8.3/4.9.  Not fixing on 4.7 branch.

It will lead to the lsb test caes
/libstdcxx-t2c/tests/LanguageSupport/LanguageSupport FAIL.
So I want to know the right return value of std::uncaught_exception() (inside
exception-constructor).

The LSB test code is as follows:

cat main.cpp
#include <string.h>
#include <iostream>

using namespace std;
class exception_test : public exception
{
        public:
                bool result;
                exception_test(): exception(){result = uncaught_exception();}
                ~exception_test() throw(){};
};

int main(int argc, char ** argv)
{
        bool result;

        try
        {
                throw exception_test();
        }
        catch(exception_test et)
        {
                result = et.result;
        }
        cerr << result << endl;
        return 0;
}

# g++ ./main.cpp
# ./a.out
0

My GCC version is 4.9.2, the return value of result is 0,and the test is FAIL.
If the the return value of result is 1,and the test will be PASS.