Comment 22 for bug 1050774

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Colin Watson (cjwatson) wrote : Re: grub-script-check assert failure: *** glibc detected *** /usr/bin/grub-script-check: double free or corruption (!prev): 0x08210b38 ***

The problems here appear to stem from the terrible parsing in os-prober's grub2 handler. Fixing this is complex, but should be doable. However, I will need to think about some other practicalities as well. Since we may well need to cope with current grub.cfg being parsed by old os-prober on other systems, it may be necessary to contort the syntax a little so that it doesn't confuse older versions of os-prober quite so much.