onAssertErrorMsg

fnvoid onAssertErrorMsg( string file, size_t line, string msg ) nothrow

A callback for assert errors in D. The user-supplied assert handler will be called if one has been supplied, otherwise an AssertError will be thrown.

`file`	The name of the file that signaled this error.
`line`	The line number on which this error occurred.
`msg`	An error message supplied by the user.