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This BIG PATCH contains most of the work for the New Coercion Representation
[ghc-hetmet.git]
/
compiler
/
rename
/
RnBinds.lhs
diff --git
a/compiler/rename/RnBinds.lhs
b/compiler/rename/RnBinds.lhs
index
0b10764
..
503953d
100644
(file)
--- a/
compiler/rename/RnBinds.lhs
+++ b/
compiler/rename/RnBinds.lhs
@@
-357,7
+357,9
@@
rnLocalValBindsAndThen binds@(ValBindsIn _ sigs) thing_inside
-- let x = x in 3
-- should report 'x' unused
; let real_uses = findUses dus result_fvs
-- let x = x in 3
-- should report 'x' unused
; let real_uses = findUses dus result_fvs
- ; warnUnusedLocalBinds bound_names real_uses
+ -- Insert fake uses for variables introduced implicitly by wildcards (#4404)
+ implicit_uses = hsValBindsImplicits binds'
+ ; warnUnusedLocalBinds bound_names (real_uses `unionNameSets` implicit_uses)
; let
-- The variables "used" in the val binds are:
; let
-- The variables "used" in the val binds are:
@@
-453,7
+455,7
@@
rnBind :: (Name -> [Name]) -- Signature tyvar function
rnBind _ trim (L loc bind@(PatBind { pat_lhs = pat
, pat_rhs = grhss
-- pat fvs were stored in bind_fvs
rnBind _ trim (L loc bind@(PatBind { pat_lhs = pat
, pat_rhs = grhss
-- pat fvs were stored in bind_fvs
- -- after processing the LHS
+ -- after processing the LHS
, bind_fvs = pat_fvs }))
= setSrcSpan loc $
do { let bndrs = collectPatBinders pat
, bind_fvs = pat_fvs }))
= setSrcSpan loc $
do { let bndrs = collectPatBinders pat
@@
-473,7
+475,7
@@
rnBind sig_fn trim
, fun_infix = is_infix
, fun_matches = matches }))
-- invariant: no free vars here when it's a FunBind
, fun_infix = is_infix
, fun_matches = matches }))
-- invariant: no free vars here when it's a FunBind
- = setSrcSpan loc $
+ = setSrcSpan loc $
do { let plain_name = unLoc name
; (matches', fvs) <- bindSigTyVarsFV (sig_fn plain_name) $
do { let plain_name = unLoc name
; (matches', fvs) <- bindSigTyVarsFV (sig_fn plain_name) $