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Clip Zip Divide by Zero 30083AC0

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saratoga:
Config file doesn't matter for me (crashes if its deleted), but the folder does matter.  If I put it in a directory alone, then it plays.  If I put it in a directory with one other MP3 file so that a track after it must be buffered, then it crashes. 

Try with this folder:

http://mit.edu/mgg6/www/crashes.7z

Edit:  This crashes the Zip, but not the Clip+.

mudlord:
Found something interesting, indeed doesnt crash from the Zip's internal memory, only crashes from the microSD card. I'll try adding more files and seeing what happens from internal memory.

edit: yep, confirmed your crash scenario with internal memory, too.

dreamlayers:
I'm getting crashes when running from internal memory when there are other things to play afterwards. There is no crash if the m4a is the only playable file in the directory or if it comes last. The crash is when fetching cached->id at the "if (cached && cached->id == handle_id) {" line in find_handle() in apps/buffering.c:

Edit: disregard what I said before. It is actually in the while loop lower down in find_handle(), when fetching m->id:

http://git.rockbox.org/?p=rockbox.git;a=blob;f=apps/buffering.c;h=96ec92201fffa468128c10015fad6580d5bbff1c;hb=HEAD#l403


--- Code: ---    while (m && m->id != handle_id) {
        m = m->next;
    }

--- End code ---

Edit2: This is a RAM dump when the crash occurred: https://dl.dropboxusercontent.com/u/16662598/Rockbox/internal_ram_clipzip_buffercrash.bin.xz This seems to be the handle situation. Offsets are in RAM dump, which started at 0x30000000 in memory. first_handle (pointer to first handle) is at A4A40 and pointer to next handle is at handle offset plus 0x12C.

1680a0 id=1
168918 id=2
169124 Next handle should be here, but there's no sign of it and other data instead.

Edit3: This starts around 7d1a47c Rewrite filesystem code (WIP), because 95a4c3a works but da4938d crashes.

jhMikeS:
This is particular to the file format?

saratoga:

--- Quote from: jhMikeS on April 28, 2015, 03:57:20 PM ---This is particular to the file format?

--- End quote ---

I have only been able to reproduce it with an AAC followed by an MP3. 

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