In Anacoda 13.42, when the total size of all packages being installed is less then 1kB, Anaconda crashes:

anaconda 13.42 exception report
Traceback (most recent call first):
File "/usr/lib/anaconda/yuminstall.py", line
219, in callback
self.progress.set_fraction(float(self.doneSize
/ self.totalSize))
ZeroDivisionError: float division 

The totalSize variable is calculated as a total number of kilobytes to be installed. If the size of the package is less than 1024 bytes, the division by 1024 returns zero (an integer division is used).

We have patched Anaconda to always make the total size non-zero:


*** yuminstall.py       2010-05-07 03:11:33.000000000 -0400
--- yuminstall_backup.py        2011-02-16 06:21:37.602888749 -0500
***************
*** 216,221 ****
--- 216,223 ----
                                            self.numpkgs)
                                         % {'donepkgs': self.donepkgs,
                                            'numpkgs': self.numpkgs})
+             if self.totalSize < 1:                                      
+                 self.totalSize = 1
              self.progress.set_fraction(float(self.doneSize / self.totalSize))
              self.progress.processEvents()