I have a cron job that plays a playlist every night using these commands:

mixer volume 25
playlist shuffle 1
playlist play sleepytime

It produces this backtrace when it occurs:

2004-08-03 21:05:10.1952 Non-URL passed to InfoHash::info 
(/home/slimp3/playlists/sleepytime.m3u)
2004-08-03 21:05:10.2008 Backtrace:

frame 0: Slim::Music::Info::infoHash 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Music/Info.pm line 983)
frame 1: Slim::Music::Info::infoFormat 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Music/Info.pm line 1167)
frame 2: Slim::Music::Info::standardTitle 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Web/Pages.pm line 674)
frame 3: Slim::Web::Pages::playlist 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Web/HTTP.pm line 638)
frame 4: Slim::Web::HTTP::generateHTTPResponse 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Web/HTTP.pm line 560)
frame 5: Slim::Web::HTTP::processURL 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Web/HTTP.pm line 436)
frame 6: Slim::Web::HTTP::processHTTP 
(/home/slimp3/SlimServer_v5.3.0b1/Slim/Networking/Select.pm line 116)
frame 7: Slim::Networking::Select::select (slimserver.pl line 428)
frame 8: main::idle (slimserver.pl line 371)
frame 9: main::main (slimserver.pl line 832)

This m3u file consists of both file paths and file:/// urls

/export/music/handel/harp_concertos/dittersdorf_-_harp_concerto_-_robles_-_brown_-_02_larghetto.mp3
file:///export/music/stars_of_the_lid/the_ballasted_orchestra/stars_of_the_lid_-_the_ballasted_orchestra.mp3#0-223.493333333333
...

Actual playback doesn't seem to be affected - but it would be nice to
discover the cause of the noisy backtrace. I will attach the full m3u
playlist.