# HG changeset patch
# User Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
# Date 2008-11-12 15:32:21
# Node ID eee5b7b9c5d2eb61a51f85a9ea2abccedda90ce9
# Parent  fac7e9070a192862c29bd7e6591a45dfdabf1acd

graphlog: add assertion for allowed n_column_diff range

diff --git a/hgext/graphlog.py b/hgext/graphlog.py
--- a/hgext/graphlog.py
+++ b/hgext/graphlog.py
@@ -195,6 +195,7 @@ def ascii(ui, grapher):
     prev_node_index = 0
     for (node_ch, node_lines, node_index, edges, n_columns, n_columns_diff) in grapher:
 
+        assert -2 < n_columns_diff < 2
         if n_columns_diff == -1:
             # Transform
             #