id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11330	boost::chrono::duration default constructor doesn't initialize rep_	florent.castelli@…	viboes	"According to the documentation:
{{{
constexpr duration();
Effects: Constructs an object of type duration from duration_values<rep>::zero().
}}}
The implementation is:
{{{
#if  defined   BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
        BOOST_FORCEINLINE BOOST_CONSTEXPR
        duration() : rep_(duration_values<rep>::zero()) { }
#else
        BOOST_CONSTEXPR duration() BOOST_NOEXCEPT {};
#endif
}}}

So in one side is does initialise to zero, not in the other side. This is a breaking change triggering tons of MSan issues in my application (and certainly bugs in real applications).
Setting rep_ to zero() as it is done above fixes the issue for me."	Bugs	closed	Boost 1.60.0	chrono	Boost 1.58.0	Regression	fixed