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-rw-r--r--compiler/codeGen/StgCmmExpr.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/codeGen/StgCmmExpr.hs b/compiler/codeGen/StgCmmExpr.hs
index 4db1dffdfc..68bfb6d9fe 100644
--- a/compiler/codeGen/StgCmmExpr.hs
+++ b/compiler/codeGen/StgCmmExpr.hs
@@ -572,7 +572,7 @@ cgAltRhss gc_plan retry_lbl bndr alts
; return con }
maybeAltHeapCheck :: GcPlan -> Maybe BlockId -> FCode a -> FCode a
-maybeAltHeapCheck NoGcInAlts mlbl code = code
+maybeAltHeapCheck NoGcInAlts _ code = code
maybeAltHeapCheck (GcInAlts regs) mlbl code =
case mlbl of
Nothing -> altHeapCheck regs code