[Boost-users] [log] Setting log format with string

Subject: [Boost-users] [log] Setting log format with string
From: Dirk Van Haerenborgh (dvhaeren_at_[hidden])
Date: 2018-02-07 11:18:44

Hi,

I'm trying to simply set the log format of the sinks using a 
string. For example from a config file or just in code.

Take for instance this simple line taken from the basic_example 
(https://github.com/boostorg/log/blob/master/example/basic_usage/
main.cpp)

logging::add_console_log(std::clog, keywords::format = 
"%TimeStamp%: %Message%");

Whenever I add %Timestamp% to the log format, I keep getting 
this error:

terminate called after throwing an instance of 
'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::gregorian::bad_year> 
>'
  what():  Year is out of valid range: 1400..10000

I can easily reproduce this by running these examples (without 
modification):
https://github.com/boostorg/log/blob/master/example/basic_usage/
main.cpp
https://github.com/boostorg/log/blob/master/example/
settings_file/main.cpp

Am I doing something wrong?
I have this same behaviour on both boost1.62 and boost1.65. The 
former as installed from the debian package manager. The latter 
was manually compiled...

-Dirk