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-rw-r--r--LocationLog.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/LocationLog.hs b/LocationLog.hs
index 6d52f4bdd..e4dad03f5 100644
--- a/LocationLog.hs
+++ b/LocationLog.hs
@@ -32,6 +32,7 @@ import System.Locale
import qualified Data.Map as Map
import System.Directory
import System.Posix.Process
+import Control.Monad (when)
import qualified GitRepo as Git
import Utility
@@ -86,6 +87,8 @@ instance Read LogLine where
- and returns the filename of the logfile. -}
logChange :: Git.Repo -> Key -> UUID -> LogStatus -> IO FilePath
logChange repo key u s = do
+ when (null u) $
+ error $ "bug detected: unknown UUID for " ++ Git.repoDescribe repo
line <- logNow s u
ls <- readLog logfile
writeLog logfile (compactLog $ line:ls)