boost::format in debug build is no longer able to format time_duration with hours >= 100, as of svn rev 49874

[mbd@…]

​https://svn.boost.org/trac/boost/changeset/49874 breaks boost::format's ability to format a time_duration if it has more than 99 hours.

It is unclear from the docs whether this is intended behaviour or not. I believe it is because boost::format uses the default time_facet format of "%H:%M:%S%F". Had it been using "%O:%M:%S%F", I think there would have been no breakage(?)

The attached minimal program illustrates the problem.

[mbd@…]

Minimal program that illustrates problems when formatting a time_duration with more than 99 hours. Make sure to use a debug build of boost to get an assertion.

[Samuel Krempp]

boost::format only forwards to iostream without any specific handling, the issue is thus about date_time's output operators - or that behavious is intended.

If you do not specify the desired formatting through the locale (see http://www.boost.org/doc/libs/1_40_0/doc/html/date_time/date_time_io.html) and set boost::format to use it, then boost::format simply use default locale.

I am not familiar with boost::date_time but assumes the assertion in the attached case is intended.

[mbd@…]

In fact, I think it would be more appropiate to file this as a duplicate of issue 1861, which appears to have been resolved 6 weeks ago. I have yet to check.

As 1861 indicates, this is (was) a real issue. I am not certain that 1861 *does* fix this issue, but if not, I actually believe that this issue should be resolved.

Regards

[Samuel Krempp]

You're right, I'll reopen it just to mark it correctly

[Samuel Krempp]

duplicate of #1861 (which is fixed)