index.Reader.filter: throw when parent's missing (don't assert)

...since we're planning to make the tests fail on assertion failures.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Rob Browning <rlb@defaultvalue.org>
[rlb@defaultvalue.org: adjust commit message]
Tested-by: Rob Browning <rlb@defaultvalue.org>

diff --git a/lib/bup/index.py b/lib/bup/index.py
index 591079a7b59b2963b47692cfe9ef40d6277c103b..3b98892b41b6b223bf74c9d4c5779439b718376f 100644 (file)
--- a/lib/bup/index.py
+++ b/lib/bup/index.py
@@ -522,7 +522,8 @@ class Reader:
                 # Otherwise something like "save x/y" will produce
                 # nothing if x is up to date.
                 pe = self.find(rp)
-                assert(pe)
+                if not pe:
+                    raise Exception("cannot find %r" % rp)
                 name = path + pe.name[len(rp):]
                 yield (name, pe)