[commit: ghc] master: Test #7643 in typecheck/should_compile/T7643. (63d2ada)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/63d2adaef999258d874a760591e9c9ec3d75aeaf/ghc

>---------------------------------------------------------------

commit 63d2adaef999258d874a760591e9c9ec3d75aeaf
Author: Richard Eisenberg <eir at cis.upenn.edu>
Date:   Mon Nov 24 15:13:53 2014 -0500

    Test #7643 in typecheck/should_compile/T7643.


>---------------------------------------------------------------

63d2adaef999258d874a760591e9c9ec3d75aeaf
 testsuite/tests/typecheck/should_compile/T7643.hs | 11 +++++++++++
 testsuite/tests/typecheck/should_compile/all.T    |  1 +
 2 files changed, 12 insertions(+)

diff --git a/testsuite/tests/typecheck/should_compile/T7643.hs b/testsuite/tests/typecheck/should_compile/T7643.hs
new file mode 100644
index 0000000..77071d5
--- /dev/null
+++ b/testsuite/tests/typecheck/should_compile/T7643.hs
@@ -0,0 +1,11 @@
+{-# LANGUAGE MagicHash, TypeFamilies #-}
+
+module T7643 where
+
+import GHC.Exts
+
+type family T
+type instance T = RealWorld
+
+foo :: () -> State# T
+foo _ = unsafeCoerce# realWorld#
diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T
index b16ff43..291d118 100644
--- a/testsuite/tests/typecheck/should_compile/all.T
+++ b/testsuite/tests/typecheck/should_compile/all.T
@@ -431,3 +431,4 @@ test('T9151', normal, compile, [''])
 test('T9497a', normal, compile, ['-fdefer-typed-holes'])
 test('T9497b', normal, compile, ['-fdefer-typed-holes -fno-warn-typed-holes'])
 test('T9497c', normal, compile, ['-fdefer-type-errors -fno-warn-typed-holes'])
+test('T7643', normal, compile, [''])