id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11317	boost unique_lock has no mutex	shyamps@…	viboes	"This is an issue I am observing in the newly released boost_1_58 library. I suspect the problem may not be boost related, and could be an msvc 12.0 compiler related issue. The symptom I observe is that when a Visual C++ project TURNS ON one of the compiler optimization flags /Og, /O1, /O2 or /Ox Flags, the C++ code that I am using below is throwing an exception:

Below is the sample code I use in the application:

boost::mutex::scoped_lock <Scoped Lock Variable> (<Mutex Object>)

Below is the exception message I am seeing which strangely occurs the second time a scoped lock is called on the same valid Mutex Object within the application:

""boost unique_lock has no mutex""

I am baffled by what causes this problem. When I turn off the optimization flags and execute the program, the application executes flawlessly. Only when I turn on optimization flags, this error consistently occurs. Workaround I am using is to disable optimization Flags for the release version.

Below is my build configuration:

Visual Studio community edition 2013, which uses msvc 12 compiler version;
Windows 8.1;
boost Library version 1.58"	Support Requests	closed	To Be Determined	thread	Boost 1.58.0	Problem	wontfix	boost unique_lock has no mutex