brew upgrade mysql

gistfile1.txt

$ brew upgrade mysql
Warning: Your Xcode (3.2.5) is outdated
Please install Xcode 3.2.6.
==> Upgrading mysql
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/mysql-5.5.28.snowleopard.bottle.tar.gz
######################################################################## 100.0%
==> Pouring mysql-5.5.28.snowleopard.bottle.tar.gz
==> Caveats
Set up databases to run AS YOUR USER ACCOUNT with:
    unset TMPDIR
    mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp

To set up base tables in another folder, or use a different user to run
mysqld, view the help for mysqld_install_db:
    mysql_install_db --help

and view the MySQL documentation:
  * http://dev.mysql.com/doc/refman/5.5/en/mysql-install-db.html
  * http://dev.mysql.com/doc/refman/5.5/en/default-privileges.html

To run as, for instance, user "mysql", you may need to `sudo`:
    sudo mysql_install_db ...options...

Start mysqld manually with:
    mysql.server start

    Note: if this fails, you probably forgot to run the first two steps up above

A "/etc/my.cnf" from another install may interfere with a Homebrew-built
server starting up correctly.

To connect:
    mysql -uroot

To launch on startup:
* if this is your first install:
    mkdir -p ~/Library/LaunchAgents
    cp /usr/local/Cellar/mysql/5.5.28/homebrew.mxcl.mysql.plist ~/Library/LaunchAgents/
    launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

* if this is an upgrade and you already have the homebrew.mxcl.mysql.plist loaded:
    launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
    cp /usr/local/Cellar/mysql/5.5.28/homebrew.mxcl.mysql.plist ~/Library/LaunchAgents/
    launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

You may also need to edit the plist to use the correct "UserName".

Warning: Non-executables were installed to "bin".
Installing non-executables to "bin" is bad practice.
The offending files are:
/usr/local/Cellar/mysql/5.5.28/bin/mysqlaccess.conf
Error: Will not overwrite /usr/local/Cellar/mysql/5.5.28/homebrew.mxcl.mysql.plist
brew upgrade mysql  2.31s user 3.44s system 32% cpu 17.845 total

Same here.

Thirded. I'm also trying to debug this issue

Same here.

I got the same error on a clean install of mysql.