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From Branko ─îibej <br...@apache.org>
Subject Re: SHA-1 collision in repository?
Date Thu, 22 Feb 2018 22:13:39 GMT
On 22.02.2018 21:30, Myria wrote:
> When we try to commit a very specific version of a very specific
> binary file, we get a SHA-1 collision error from the Subversion
> repository:
>
> D:\confidential>svn commit secret.bin -m "Testing broken commit"
> Sending        secret.bin
> Transmitting file data .svn: E160000: Commit failed (details follow):
> svn: E160000: SHA1 of reps '604440 34 134255 136680
> c9f4fabc4d093612fece03c339401058
> db11617ef1454332336e00abc311d44bc698f3b3 605556-czmh/_8' and '-1 0
> 134255 136680 c9f4fabc4d093612fece03c339401058
> db11617ef1454332336e00abc311d44bc698f3b3 605556-czmh/_8' matches
> (db11617ef1454332336e00abc311d44bc698f3b3) but contents differ
>
>
> What can cause this?

The simplest explanation would be a corruption of the existing
representation on disk. Note that both the MD5 and the SHA1 checksums
appear to match, as do the sizes; which makes it even more likely that
it's the same file but the copy in the repository is somehow corrupted.

-- Brane


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