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-rw-r--r--src/GF/Devel/Grammar/Lookup.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/GF/Devel/Grammar/Lookup.hs b/src/GF/Devel/Grammar/Lookup.hs
index 876d60d26..d8747a1e4 100644
--- a/src/GF/Devel/Grammar/Lookup.hs
+++ b/src/GF/Devel/Grammar/Lookup.hs
@@ -44,7 +44,7 @@ lookupOperType gr m c = do
case jform ju of
JParam -> return typePType
_ -> case jtype ju of
- Meta _ -> fail "no type given"
+ Meta _ -> fail ("no type given to " ++ prIdent m ++ "." ++ prIdent c)
ty -> return ty
---- can't be just lookupJField jtype