It appears that we have recently hit the hard quota limit for disk space
on the sdcc-builder account on the SourceForge compiler farm (which builds
the daily snapshots), causing some of the recent snapshots to fail. I have
freed up some space by deleting the contents of ~/build.mingw32/download
(after downloading it, in case we need it again), since these seemed to be
left over from building the mingw32 gcc cross compiler and not actually
needed on a daily basis. Probably more should be pruned, but this should
free up enough space to get the daily snapshots running again.