Public bug reported:
At least in this one case.
Josh Arenson and I were debugging a problem with a greeter / lightdm /
unity-system-compositor. It turned out to be because lightdm was
passing unity-system-compositor "--from-dm-fd=0" which resulted in an
asio exception when it tried to use fd 0.
But the exception looked like:
"""
ERROR: Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type:
boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error>
>
std::exception::what: assign: Operation not permitted
"""
It took us a surprising amount of effort to track down where this was
actually failing (which was the usc::AsioDMConnection::AsioDMConnection
constructor in src/asio_dm_connection.cpp).
I don't have a suggested fix, just a request to make similar failure-
hunts easier. Or at the least, this specific error case more obvious.
** Affects: unity-system-compositor (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1590447
Title:
Error reporting could be better
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