crashes due to the wrong way using aligned_storage.
Steps to reproduce:
1. Start a consumer
channel.consume(queue, tag).onMessage(msgCallback)
2. Send a message to the consumer
3. The program crashes
Environment:
Windows 7 / VS2010
The reason:
The Windows prompted to memory corruption, I found some strange phenomenon
about stack_ptr<Message>, such as:
1.sizeof(stack_ptr<Message>) is equal to 2
2.stack_ptr._initialized becomes true after construct() called (actually,
it never has been assigned true, please see [1])
Finally I found that the root cause was stack_ptr._data, we directly used
aligned_storage rather than aligned_storage::type[2] as the type of _data.
so the _data was just an empty struct, and subsequent operations were
performed in illegal memory. It eventually led to the crash.
This patch we fixed the bug and add "_initialized = true" at the end of the
method stack_ptr::construct().
[1] https://github.com/CopernicaMarketingSoftware/AMQP-CPP/blob/master/include/stack_ptr.h#L83
[2] http://www.cplusplus.com/reference/type_traits/aligned_storage/
Martijn Otto
javeme