Since several days strange things happen:

<pre> Delta compression using up to 2 threads. Compressing objects: 100% (8/8), done. error: inflate: data stream error (incorrect header check) error: corrupt loose object 'ebcab349c392aadd151101e6b2651ed451ff4bf7' fatal: object ebcab349c392aadd151101e6b2651ed451ff4bf7 is corrupted error: pack-objects died with strange error </pre>

as well as mysterious compile errors and stuff like that. One similarity is a raised memory access pattern, ... starting memtest to verify my assumption.