# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1562057609 -7200
# Node ID 30033d56758f688a37342a2040a938a3b20b9a7c
# Parent  2c27b7fadcd3afabdcd9f72a6984166a8f6e39f4
debugrevlog: fix average size computation for empty data (issue6167)

If the file has no full snapshot (eg: was always empty), `hg debugrevlog` would
fails when trying to compute their average size.

diff -r 2c27b7fadcd3 -r 30033d56758f mercurial/debugcommands.py
--- a/mercurial/debugcommands.py	Sat Jun 29 23:23:07 2019 -0400
+++ b/mercurial/debugcommands.py	Tue Jul 02 10:53:29 2019 +0200
@@ -2274,7 +2274,10 @@
     totalrawsize = datasize[2]
     datasize[2] /= numrevs
     fulltotal = fullsize[2]
-    fullsize[2] /= numfull
+    if numfull == 0:
+        fullsize[2] = 0
+    else:
+        fullsize[2] /= numfull
     semitotal = semisize[2]
     snaptotal = {}
     if numsemi > 0: