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What is head revision and specific version in SVN?

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Can anyone give me what is useful and when we actually use?

posted Aug 30, 2018 by anonymous

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SVN: Unexpected behaviour when checking out a copy at an invalid revision

Checking out a copied directory at a revision prior to the copy results in a checkout of the data before the copy. I would expect this to fail in the same way that attempting to update to an invalid revision fails.

Is this the intended behaviour? If so, shouldn't there be some message that your working copy is using a different location than requested?

 > svn copy trunk mybranch -m 'copy test'
Committed revision 2

 > svn co mybranch -r1 mybranch

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Relative URL: ^trunk

Checking out the branch at a valid revision then attempting to update to the earlier revision results in an error:

 svn: E160005: Target path 'mybranch' does not exist

(I was attempting to checkout the revision given by 'Last Changed Rev' from 'svn info' on a child of a copied directory - it points at a revision before the copy, but that's a different discussion)

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I recently upgraded my Subversion client from version 1.7.5 to 1.8.3 and from that time on I experience hangs when executing multiple 'svn log' commands in a short amount of time. The "hanging" svn process consumes all CPU cycles it gets but never finishes.

I can reproduce the problem using the following shell script (on Windows using Cygwin):

#!/bin/bash
ROOT="http://example.com/svn/trunk"
for DIR in $(svn ls "${ROOT}" | head -n 4); do
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done

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