Repository : ssh://darcs.haskell.org//srv/darcs/testsuite

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/cede5cb4d54ae4496f41394e0c484c669720765a

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

commit cede5cb4d54ae4496f41394e0c484c669720765a
Author: Simon Peyton Jones <[email protected]>
Date:   Wed Sep 14 15:30:34 2011 +0100

    Test Trac #5478

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

 tests/deriving/should_fail/T5478.hs     |    6 ++++++
 tests/deriving/should_fail/T5478.stderr |    5 +++++
 tests/deriving/should_fail/all.T        |    1 +
 3 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/tests/deriving/should_fail/T5478.hs 
b/tests/deriving/should_fail/T5478.hs
new file mode 100644
index 0000000..e7941b1
--- /dev/null
+++ b/tests/deriving/should_fail/T5478.hs
@@ -0,0 +1,6 @@
+{-# LANGUAGE MagicHash #-}
+module T5478 where
+
+import GHC.Exts
+
+data Foo = Foo0 ByteArray#  deriving Show
diff --git a/tests/deriving/should_fail/T5478.stderr 
b/tests/deriving/should_fail/T5478.stderr
new file mode 100644
index 0000000..f6f00d5
--- /dev/null
+++ b/tests/deriving/should_fail/T5478.stderr
@@ -0,0 +1,5 @@
+
+T5478.hs:6:38:
+    Can't make a derived instance of `Show Foo':
+      Don't know how to derive `Show' for type `ByteArray#'
+    In the data type declaration for `Foo'
diff --git a/tests/deriving/should_fail/all.T b/tests/deriving/should_fail/all.T
index 9c362cc..ff65037 100644
--- a/tests/deriving/should_fail/all.T
+++ b/tests/deriving/should_fail/all.T
@@ -33,4 +33,5 @@ test('T3833', normal, compile_fail, [''])
 test('T3834', normal, compile_fail, [''])
 test('T4528', normal, compile_fail, [''])
 test('T5287', normal, compile_fail, [''])
+test('T5478', normal, compile_fail, [''])
 



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