tor/bug40076 at 48dd87933dd1c592937ef62d20aeac8998edc0fb - tor - Git with a cup of Datura seeds

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Nick Mathewson c4742b89b2 Fix a bug in buf_move_all() when the input buffer is empty.

We found this in #40076, after we started using buf_move_all() in
more places.  Fixes bug #40076; bugfix on 0.3.3.1-alpha.  As far as
I know, the crash only affects master, but I think this warrants a
backport, "just in case".

2020-07-30 14:24:25 -04:00

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   o Minor bugfixes (correctness, buffers):
     - Fix a correctness bug that could cause an assertion failure if we ever
       tried using the buf_move_all() function with an empty input.
       As far as we know, no released versions of Tor do this.
       Fixes bug 40076; bugfix on 0.3.3.1-alpha.