This is actually being generated when calling the error handler (Dan was getting a 401 db query failed), triggering error handler which was then failing with above messages

The db_query problem was permissions related. Update was not granted. Once granted, all worked well.

To be clear, this is a problem with error reporting. If you comment out set_error_handler( 'error_handler' ); at ~line4/5 of core/error_api.php, you'll see this in the error log:

[error] PHP Fatal error: 401 in core/database_api.php on line 86

mysql_error() returns nothing. mysql_errorno() returns nothing.

I think my recent fix to fix the following backtrace would also be the resolution for my previous comment here:

Call Stack

Time Memory Function Location

1 0.0161 86936 {main}( ) ..(null):0
2 0.2951 10640712 file_add( ) ..(null):45
3 0.3240 13728480 db_query_bound( ) ..(null):669
4 0.3659 13731088 trigger_error ( ) ..(null):220
5 0.3659 13731088 error_handler( ) ..(null):0
6 0.3782 13739008 html_page_top2( ) ..(null):109
7 0.3857 13739328 html_login_info( ) ..(null):119
8 0.4003 13742400 print_project_option_list( ) ..(null):362
9 0.4003 13743176 project_cache_all( ) ..(null):372
10 0.4009 13743776 db_query( ) ..(null):83
11 0.4019 13744384 trigger_error ( ) ..(null):163