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-rw-r--r--compiler/GHC/Stg/Subst.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Stg/Subst.hs b/compiler/GHC/Stg/Subst.hs
index dce2859262..798a1f38bd 100644
--- a/compiler/GHC/Stg/Subst.hs
+++ b/compiler/GHC/Stg/Subst.hs
@@ -80,5 +80,5 @@ extendInScope id (Subst in_scope env) = Subst (in_scope `extendInScopeSet` id) e
-- holds after extending the substitution like this.
extendSubst :: Id -> Id -> Subst -> Subst
extendSubst id new_id (Subst in_scope env)
- = ASSERT2( new_id `elemInScopeSet` in_scope, ppr id <+> ppr new_id $$ ppr in_scope )
+ = assertPpr (new_id `elemInScopeSet` in_scope) (ppr id <+> ppr new_id $$ ppr in_scope) $
Subst in_scope (extendVarEnv env id new_id)