As far as I can see from googling around the alc_cleanup: 1 device not closed thing really isn't important and doesn't mean much because the OS will clean up the resources anyway. Shouldn't affect the running of the program. If you were wondering AL lib refers to OpenAL or Open Audio Library which minecraft uses.
Edit: I also believe that this bug is because of or causing a small memory leak. Looking at system monitor the memory usage increases by about a mebibyte every 4 seconds and doesn't stop.
I wouldn't put it past the Al resources not closing to be because of the new sound system.
As far as I can see from googling around the alc_cleanup: 1 device not closed thing really isn't important and doesn't mean much because the OS will clean up the resources anyway. Shouldn't affect the running of the program.
If you were wondering AL lib refers to OpenAL or Open Audio Library which minecraft uses.
Edit: I also believe that this bug is because of or causing a small memory leak.
Looking at system monitor the memory usage increases by about a mebibyte every 4 seconds and doesn't stop.
I wouldn't put it past the Al resources not closing to be because of the new sound system.