From: Sebastian Wagner <sewagner@redhat.com>
Date: Tue, 16 Nov 2021 13:08:56 +0000 (+0100)
Subject: teuthology/suite/matrix.py: Add item to assert msg
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=006981320d20466f3f88a63932a725f66adcea51;p=teuthology.git

teuthology/suite/matrix.py: Add item to assert msg

Give folks at least some hint about where things might
be broken:

```
AssertionError: Sum requires non-empty _submats: 0-distro
```

Signed-off-by: Sebastian Wagner <sewagner@redhat.com>
---

diff --git a/teuthology/suite/matrix.py b/teuthology/suite/matrix.py
index 8938fe7d86..055c448523 100644
--- a/teuthology/suite/matrix.py
+++ b/teuthology/suite/matrix.py
@@ -248,7 +248,7 @@ class Sum(Matrix):
     """
     def __init__(self, item, _submats):
         assert len(_submats) > 0, \
-            "Sum requires non-empty _submats"
+            f"Sum requires non-empty _submats: {item}"
         self.item = item
 
         self._pseudo_size = lcml((i.size() for i in _submats)) * len(_submats)