# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 2019-07-02 08:53:29
# 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 --git a/mercurial/debugcommands.py b/mercurial/debugcommands.py
--- a/mercurial/debugcommands.py
+++ b/mercurial/debugcommands.py
@@ -2274,7 +2274,10 @@ def debugrevlog(ui, repo, file_=None, **
     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: