diff --git a/compiler/main/HscTypes.hs b/compiler/main/HscTypes.hs
index fa0eed2344db7b5b76f4d6fdafbadeb9c5c5116f..ee0afd4e0268d7425f304eec417c7deb5a5e952f 100644
--- a/compiler/main/HscTypes.hs
+++ b/compiler/main/HscTypes.hs
@@ -1641,7 +1641,7 @@ extendInteractiveContext ictxt new_tythings new_cls_insts new_fam_insts defaults
= ictxt { ic_mod_index = ic_mod_index ictxt + 1
-- Always bump this; even instances should create
-- a new mod_index (Trac #9426)
- , ic_tythings = new_tythings ++ ic_tythings ictxt
+ , ic_tythings = new_tythings ++ old_tythings
, ic_rn_gbl_env = ic_rn_gbl_env ictxt `icExtendGblRdrEnv` new_tythings
, ic_instances = ( new_cls_insts ++ old_cls_insts
, new_fam_insts ++ fam_insts )
@@ -1651,6 +1651,8 @@ extendInteractiveContext ictxt new_tythings new_cls_insts new_fam_insts defaults
, ic_fix_env = fix_env -- See Note [Fixity declarations in GHCi]
}
where
+ new_ids = [id | AnId id <- new_tythings]
+ old_tythings = filterOut (shadowed_by new_ids) (ic_tythings ictxt)
-- Discard old instances that have been fully overridden
-- See Note [Override identical instances in GHCi]
@@ -1662,10 +1664,17 @@ extendInteractiveContextWithIds :: InteractiveContext -> [Id] -> InteractiveCont
extendInteractiveContextWithIds ictxt new_ids
| null new_ids = ictxt
| otherwise = ictxt { ic_mod_index = ic_mod_index ictxt + 1
- , ic_tythings = new_tythings ++ ic_tythings ictxt
+ , ic_tythings = new_tythings ++ old_tythings
, ic_rn_gbl_env = ic_rn_gbl_env ictxt `icExtendGblRdrEnv` new_tythings }
where
new_tythings = map AnId new_ids
+ old_tythings = filterOut (shadowed_by new_ids) (ic_tythings ictxt)
+
+shadowed_by :: [Id] -> TyThing -> Bool
+shadowed_by ids = shadowed
+ where
+ shadowed id = getOccName id `elemOccSet` new_occs
+ new_occs = mkOccSet (map getOccName ids)
setInteractivePackage :: HscEnv -> HscEnv
-- Set the 'thisPackage' DynFlag to 'interactive'
diff --git a/testsuite/tests/ghci.debugger/scripts/break011.stdout b/testsuite/tests/ghci.debugger/scripts/break011.stdout
index ac5b7e3a241365777dd968d47caea33af21965f2..47fb7b135de13187272f60a1947c6a3ed416f23a 100644
--- a/testsuite/tests/ghci.debugger/scripts/break011.stdout
+++ b/testsuite/tests/ghci.debugger/scripts/break011.stdout
@@ -23,13 +23,6 @@ _exception = SomeException
"foo"
"CallStack (from HasCallStack):
error, called at Test7.hs:2:18 in main:Main")
-Ghci1._exception :: SomeException = SomeException
- (ErrorCallWithLocation
- "foo"
- "CallStack (from HasCallStack):
- error, called at Test7.hs:<line>:<column> in <package-id>:Main")
-Ghci2._result :: a = _
-Ghci3._result :: IO a = _
_result :: a = _
_exception :: SomeException = SomeException
(ErrorCallWithLocation
diff --git a/testsuite/tests/ghci.debugger/scripts/hist001.stdout b/testsuite/tests/ghci.debugger/scripts/hist001.stdout
index 523605b00a6fad46ef5d84e9f3f3899bbf1e2aec..a19a34f315f79c3995f1f2f350e5e9da21d0cd25 100644
--- a/testsuite/tests/ghci.debugger/scripts/hist001.stdout
+++ b/testsuite/tests/ghci.debugger/scripts/hist001.stdout
@@ -12,7 +12,6 @@ Logged breakpoint at Test3.hs:2:22-31
_result :: [a]
f :: t -> a
xs :: [t]
-Ghci1._result :: [a] = _
xs :: [t] = []
f :: t -> a = _
_result :: [a] = _
@@ -20,10 +19,7 @@ Logged breakpoint at Test3.hs:2:18-20
_result :: a
f :: Integer -> a
x :: Integer
-Ghci1._result :: [a] = _
xs :: [t] = []
-Ghci2.f :: t -> a = _
-Ghci2._result :: [a] = _
x :: Integer = 2
f :: Integer -> a = _
_result :: a = _
diff --git a/testsuite/tests/ghci.debugger/scripts/hist002.stdout b/testsuite/tests/ghci.debugger/scripts/hist002.stdout
index 523605b00a6fad46ef5d84e9f3f3899bbf1e2aec..a19a34f315f79c3995f1f2f350e5e9da21d0cd25 100644
--- a/testsuite/tests/ghci.debugger/scripts/hist002.stdout
+++ b/testsuite/tests/ghci.debugger/scripts/hist002.stdout
@@ -12,7 +12,6 @@ Logged breakpoint at Test3.hs:2:22-31
_result :: [a]
f :: t -> a
xs :: [t]
-Ghci1._result :: [a] = _
xs :: [t] = []
f :: t -> a = _
_result :: [a] = _
@@ -20,10 +19,7 @@ Logged breakpoint at Test3.hs:2:18-20
_result :: a
f :: Integer -> a
x :: Integer
-Ghci1._result :: [a] = _
xs :: [t] = []
-Ghci2.f :: t -> a = _
-Ghci2._result :: [a] = _
x :: Integer = 2
f :: Integer -> a = _
_result :: a = _
diff --git a/testsuite/tests/ghci/scripts/T11547.script b/testsuite/tests/ghci/scripts/T11547.script
deleted file mode 100644
index c4c15d6f78d9dc120db1abe10b5ea9d22863bdf8..0000000000000000000000000000000000000000
--- a/testsuite/tests/ghci/scripts/T11547.script
+++ /dev/null
@@ -1,9 +0,0 @@
-foo = foo
-:t Ghci1.foo
-foo = foo
-:t Ghci2.foo
-:t Ghci1.foo
-data Foo = Foo | Bar
-data Foo = Bar
-:t Foo
-:t Ghci3.Bar
diff --git a/testsuite/tests/ghci/scripts/T11547.stdout b/testsuite/tests/ghci/scripts/T11547.stdout
deleted file mode 100644
index 6f2a8333c3ab8180c6ba30c2baf422a458edf5f5..0000000000000000000000000000000000000000
--- a/testsuite/tests/ghci/scripts/T11547.stdout
+++ /dev/null
@@ -1,5 +0,0 @@
-Ghci1.foo :: t
-Ghci2.foo :: t
-Ghci1.foo :: t
-Foo :: Ghci3.Foo
-Ghci3.Bar :: Ghci3.Foo
diff --git a/testsuite/tests/ghci/scripts/T2976.stdout b/testsuite/tests/ghci/scripts/T2976.stdout
index de31112bb334ef0d13f493aaa01afa11014a21c5..9fdc11072c2584b86a7515824f60e44e98870c7c 100644
--- a/testsuite/tests/ghci/scripts/T2976.stdout
+++ b/testsuite/tests/ghci/scripts/T2976.stdout
@@ -1,8 +1,6 @@
test :: Integer = 0
test = 0
test :: Integer = 0
-Ghci1.test :: Integer = 0
test :: [Char] = _
test = "test"
-Ghci1.test :: Integer = 0
test :: [Char] = "test"
diff --git a/testsuite/tests/ghci/scripts/all.T b/testsuite/tests/ghci/scripts/all.T
index 016c482ffb5d00850a076cb84d9b2af717109e54..2bcdd0a9fef72c4caa8adafa30a2f03fb5dd82db 100755
--- a/testsuite/tests/ghci/scripts/all.T
+++ b/testsuite/tests/ghci/scripts/all.T
@@ -238,7 +238,6 @@ test('T11376', normal, ghci_script, ['T11376.script'])
test('T12007', normal, ghci_script, ['T12007.script'])
test('T11975', normal, ghci_script, ['T11975.script'])
test('T10963', normal, ghci_script, ['T10963.script'])
-test('T11547', normal, ghci_script, ['T11547.script'])
test('T11721', normal, ghci_script, ['T11721.script'])
test('T12520', normal, ghci_script, ['T12520.script'])
test('T12091', [extra_run_opts('-fobject-code')], ghci_script,