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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 ee635508fb..e54ae46028 100644
--- a/compiler/codeGen/StgCmmExpr.hs
+++ b/compiler/codeGen/StgCmmExpr.hs
@@ -642,7 +642,7 @@ cgConApp con stg_args
; emitReturn arg_exprs }
| otherwise -- Boxed constructors; allocate and return
- = ASSERT( stg_args `lengthIs` dataConRepRepArity con )
+ = ASSERT2( stg_args `lengthIs` dataConRepRepArity con, ppr con <+> ppr stg_args )
do { (idinfo, fcode_init) <- buildDynCon (dataConWorkId con) False
currentCCS con stg_args
-- The first "con" says that the name bound to this