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-rw-r--r--ghc/compiler/deSugar/DsExpr.lhs4
1 files changed, 2 insertions, 2 deletions
diff --git a/ghc/compiler/deSugar/DsExpr.lhs b/ghc/compiler/deSugar/DsExpr.lhs
index abb2f1e850..a7f8267671 100644
--- a/ghc/compiler/deSugar/DsExpr.lhs
+++ b/ghc/compiler/deSugar/DsExpr.lhs
@@ -34,7 +34,7 @@ import FieldLabel ( FieldLabel, fieldLabelTyCon )
import CostCentre ( mkUserCC )
import Id ( Id, idType, recordSelectorFieldLabel )
import PrelInfo ( rEC_CON_ERROR_ID, iRREFUT_PAT_ERROR_ID )
-import DataCon ( DataCon, dataConWrapId, dataConArgTys, dataConFieldLabels )
+import DataCon ( DataCon, dataConWrapId, dataConFieldLabels, dataConInstOrigArgTys )
import DataCon ( isExistentialDataCon )
import Literal ( Literal(..) )
import TyCon ( tyConDataCons )
@@ -408,7 +408,7 @@ dsExpr (RecordUpdOut record_expr record_out_ty dicts rbinds)
[] -> HsVar old_arg_id
mk_alt con
- = newSysLocalsDs (dataConArgTys con in_inst_tys) `thenDs` \ arg_ids ->
+ = newSysLocalsDs (dataConInstOrigArgTys con in_inst_tys) `thenDs` \ arg_ids ->
-- This call to dataConArgTys won't work for existentials
let
val_args = zipWithEqual "dsExpr:RecordUpd" mk_val_arg