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-rw-r--r--proofs/proofview.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/proofs/proofview.ml b/proofs/proofview.ml
index ce2decc3e4..388778ff7d 100644
--- a/proofs/proofview.ml
+++ b/proofs/proofview.ml
@@ -313,7 +313,7 @@ let rec tclDISPATCHGEN null join tacs env =
Inner.get >>= fun step' ->
Inner.set {step' with comb=step.comb@step'.comb} >>
Inner.return (join x y)
- | _ , _ -> raise SizeMismatch
+ | _ , _ -> tclZERO SizeMismatch env
let unitK () () = ()
let tclDISPATCH = tclDISPATCHGEN () unitK