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-rw-r--r--src/explify.sml2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/explify.sml b/src/explify.sml
index 79e3b07f..0a84c5fe 100644
--- a/src/explify.sml
+++ b/src/explify.sml
@@ -59,7 +59,7 @@ fun explifyCon (c, loc) =
| L.CRecord (k, xcs) => (L'.CRecord (explifyKind k, map (fn (c1, c2) => (explifyCon c1, explifyCon c2)) xcs), loc)
| L.CConcat (c1, c2) => (L'.CConcat (explifyCon c1, explifyCon c2), loc)
- | L.CFold _ => raise Fail "Explify CFold"
+ | L.CFold (dom, ran) => (L'.CFold (explifyKind dom, explifyKind ran), loc)
| L.CError => raise Fail ("explifyCon: CError at " ^ EM.spanToString loc)
| L.CUnif (_, _, ref (SOME c)) => explifyCon c