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-rw-r--r--ghc/compiler/deforest/Cyclic.lhs3
1 files changed, 1 insertions, 2 deletions
diff --git a/ghc/compiler/deforest/Cyclic.lhs b/ghc/compiler/deforest/Cyclic.lhs
index 08b65d78bf..48cde68606 100644
--- a/ghc/compiler/deforest/Cyclic.lhs
+++ b/ghc/compiler/deforest/Cyclic.lhs
@@ -165,8 +165,7 @@ Comment the next section out to disable back-loops.
> if not (null back_loops){- && not (f `elem` ls')-} then
> --if length back_loops > 1 then panic "barf!" else
> d2c (head back_loops) `thenUs` \core_e ->
-> trace ("Back Loop:\n" ++
-> ppShow 80 (ppr PprDebug core_e)) $
+> pprTrace "Back Loop:\n" (ppr PprDebug core_e) $
If we find a back-loop that also occurs where we would normally make a
new function...