locale::facet::_S_create_c_locale name not valid

[kkmzero]

There might be a problem with locales on Solaris 11 operating system. After running a test program using logutil I encountered this error:

terminate called after throwing an instance of 'std::runtime_error'
  what():  locale::facet::_S_create_c_locale name not valid
Abort (core dumped)

There are two possible solutions. Either setting environment variables:

export LC_ALL=C; unset LANGUAGE

or changing this line of code in function file_open in file logutil.hpp:

filehandle.imbue(std::locale("C"));