# HG changeset patch
# User Augie Fackler <durin42@gmail.com>
# Date 2011-05-24 18:30:10
# Node ID 639f26cab2f5776d93ab33c3a92c9f88b03e5f2b
# Parent  137b03b5aea16ecc34d6ecef90460b86ce20b84a

pure parsers: properly detect corrupt index files

This new Python code should be equivalent in behavior to the if
statement at line 312 of parsers.c. Without this, the pure-python
parsers improperly ignore truncated revlogs as created in
test-verify.t.

diff --git a/mercurial/pure/parsers.py b/mercurial/pure/parsers.py
--- a/mercurial/pure/parsers.py
+++ b/mercurial/pure/parsers.py
@@ -56,6 +56,9 @@ def parse_index2(data, inline):
             n += 1
             off += s
 
+    if off != len(data):
+        raise ValueError('corrupt index file')
+
     if index:
         e = list(index[0])
         type = gettype(e[0])