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merge up to ghc HEAD 16-Apr-2011
[ghc-hetmet.git]
/
compiler
/
rename
/
RnBinds.lhs
diff --git
a/compiler/rename/RnBinds.lhs
b/compiler/rename/RnBinds.lhs
index
0b10764
..
6c57cb2
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: