Re: [PATCH 1/6] index-pack, unpack-objects: use size_t for object size

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
> 
> When unpacking objects from a packfile, the object size is decoded
> from a variable-length encoding. On platforms where unsigned long is
> 32-bit (such as Windows, even in 64-bit builds), the shift operation
> overflows when decoding sizes larger than 4GB. The result is a
> truncated size value, causing the unpacked object to be corrupted or
> rejected.
> 
> Fix this by changing the size variable to size_t, which is 64-bit on
> 64-bit platforms, and ensuring the shift arithmetic occurs in 64-bit
> space.
> 
> This was originally authored by LordKiRon <https://github.com/LordKiRon>,
> who preferred not to reveal their real name and therefore agreed that I
> take over authorship.