FIX: Bad runtime behavior when virtual base classes are mixed with delegating constructors in Visual C++ 2013

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Symptoms

A program that mixes virtual base classes and delegating constructors experiences unexpected runtime behavior, or the executable crashes.

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Cause

This issue occurs because a delegating constructor is not checking if it needs to initialize a specific virtual base class. In this case, a virtual base class is being initialized multiple times, which can cause bad runtime behavior, depending on the user code.

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Resolution

Microsoft Download Center

The following fix is available from the Microsoft Download Center:

Download VS12-KB4076900.exe now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

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Prerequisites

You must have Visual Studio 2013 Update 5 installed to apply this fix.

Restart Information

You may have to restart the computer after you apply this fix.

Replacement Information

This fix does not replace any previously released fix.

File information

File attributes

The English version of this fix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.