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-rw-r--r--compiler/cmm/ZipDataflow.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/cmm/ZipDataflow.hs b/compiler/cmm/ZipDataflow.hs
index bcddd8e072..60bcda7400 100644
--- a/compiler/cmm/ZipDataflow.hs
+++ b/compiler/cmm/ZipDataflow.hs
@@ -650,7 +650,7 @@ backward_sol check_maybe return_graph = back
}
in fixed_point
-bwd_pure_anal :: (DebugNodes m l, Outputable a)
+bwd_pure_anal :: (DebugNodes m l, LastNode l, Outputable a)
=> PassName
-> BlockEnv a
-> BackwardTransfers m l a