[commit: ghc] master: Add a test for Trac #15523 (9f932d8)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/9f932d8a609f54127510a432f399b9487ea84d6a/ghc

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

commit 9f932d8a609f54127510a432f399b9487ea84d6a
Author: Krzysztof Gogolewski <krz.gogolewski at gmail.com>
Date:   Wed Aug 15 16:49:32 2018 +0200

    Add a test for Trac #15523
    
    Summary: Fortunately the bug is not present in master.
    
    Test Plan: make test TEST=T15523
    
    Reviewers: bgamari, RyanGlScott
    
    Reviewed By: RyanGlScott
    
    Subscribers: RyanGlScott, rwbarton, carter
    
    GHC Trac Issues: #15523
    
    Differential Revision: https://phabricator.haskell.org/D5070


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

9f932d8a609f54127510a432f399b9487ea84d6a
 testsuite/tests/typecheck/should_fail/T15523.hs     | 6 ++++++
 testsuite/tests/typecheck/should_fail/T15523.stderr | 6 ++++++
 testsuite/tests/typecheck/should_fail/all.T         | 1 +
 3 files changed, 13 insertions(+)

diff --git a/testsuite/tests/typecheck/should_fail/T15523.hs b/testsuite/tests/typecheck/should_fail/T15523.hs
new file mode 100644
index 0000000..89b1bb4
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T15523.hs
@@ -0,0 +1,6 @@
+{-# LANGUAGE StrictData #-}
+
+module T15523 where
+
+newtype Duration = Foo
+data Literal = LitDuration Duration
diff --git a/testsuite/tests/typecheck/should_fail/T15523.stderr b/testsuite/tests/typecheck/should_fail/T15523.stderr
new file mode 100644
index 0000000..83b7cdb
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T15523.stderr
@@ -0,0 +1,6 @@
+
+T15523.hs:5:20: error:
+    • The constructor of a newtype must have exactly one field
+        but ‘Foo’ has none
+    • In the definition of data constructor ‘Foo’
+      In the newtype declaration for ‘Duration’
diff --git a/testsuite/tests/typecheck/should_fail/all.T b/testsuite/tests/typecheck/should_fail/all.T
index 72023d2..962ffb7 100644
--- a/testsuite/tests/typecheck/should_fail/all.T
+++ b/testsuite/tests/typecheck/should_fail/all.T
@@ -477,3 +477,4 @@ test('T15067', normal, compile_fail, [''])
 test('T15330', normal, compile_fail, [''])
 test('T15361', normal, compile_fail, [''])
 test('T15438', normal, compile_fail, [''])
+test('T15523', normal, compile_fail, ['-O'])