<system_error>: error C2382 when compiling with '/Za' (Disable Language Extensions)

<system_error>: error C2382 when compiling with '/Za' (Disable Language Extensions) by zchothia

Closed

as Fixed

Type:	Bug
ID:	745614
Opened:	6/1/2012 2:37:28 AM
Access Restriction:	Public

Workaround(s)

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User(s) can reproduce this bug

A program which is compiled with the '/Za' flag and includes the <system_error> header fails to compile with VS2012.

This issue seems to be caused by a mismatch between the prototype and declaration of the functions 'generic_category', 'iostream_category' and 'system_category' with respect to the _NOEXCEPT specifier.

Details (expand)

Visual Studio 2012 RC

Create a file 'test.cpp' with the following contents.

    #include <system_error>

    int main() {
     return 0;
    }

Compile with the command 'cl /Za test.cpp'

English

Windows 7

English

Program fails to compile with VS2012 RC (version 17.00.50522.1) with the following errors:

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(669) : error C2382: 'std::generic_category' : redefinition; different exception specifications
        C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(155) : see declaration of 'std::generic_category'
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(674) : error C2382: 'std::iostream_category' : redefinition; different exception specifications
        C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(156) : see declaration of 'std::iostream_category'
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(679) : error C2382: 'std::system_category' : redefinition; different exception specifications
        C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\system_error(157) : see declaration of 'std::system_category'

The same program compiles successfully with VS2010 (version 16.00.40219.01).

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Posted by Microsoft on 6/4/2012 at 4:42 PM

Hi,

Thanks for reporting this bug. We've already fixed it, and the fix will be available in VC11 RTM.

Please note that /Za is buggy and breaks conformant code, such as vector<unique_ptr<T>>. As a result, we recommend against using /Za, and we stopped testing the STL with it during VC10's development.

If you have any further questions, feel free to E-mail me at stl@microsoft.com .

Stephan T. Lavavej
Visual C++ Libraries Developer

Posted by Microsoft on 6/3/2012 at 8:54 PM

Thanks for your feedback.

We are rerouting this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.

Posted by MS-Moderator01 on 6/1/2012 at 2:43 AM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)