suite.py: say *which* path is invalid in _build_matrix

Signed-off-by: Dan Mick <dan.mick@redhat.com>

diff --git a/teuthology/suite.py b/teuthology/suite.py
index fa002902b31e6930b94cfe6b421ff4418a0baf7f..18000c44ce9211ec53a7901738a7af034f2806cc 100644 (file)
--- a/teuthology/suite.py
+++ b/teuthology/suite.py
@@ -916,7 +916,7 @@ def _build_matrix(path, _isfile=os.path.isfile,
                         submat)
                 submats.append(submat)
             return matrix.Sum(item, submats)
-    assert False, "Invalid path seen in _build_matrix"
+    assert False, "Invalid path %s seen in _build_matrix" % path
     return None