[commit: ghc] master: Add a test for Trac #15586 (a3a1a17)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/a3a1a17ba7ddbc40b093c732e7e3a916b9531eac/ghc

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

commit a3a1a17ba7ddbc40b093c732e7e3a916b9531eac
Author: Krzysztof Gogolewski <krz.gogolewski at gmail.com>
Date:   Tue Sep 4 15:42:52 2018 +0200

    Add a test for Trac #15586
    
    Summary: The bug is already fixed in master.
    
    Test Plan: make test TEST=T15586
    
    Reviewers: bgamari, simonpj
    
    Reviewed By: simonpj
    
    Subscribers: rwbarton, carter
    
    GHC Trac Issues: #15586
    
    Differential Revision: https://phabricator.haskell.org/D5118


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

a3a1a17ba7ddbc40b093c732e7e3a916b9531eac
 testsuite/tests/typecheck/should_compile/T15586.hs | 12 ++++++++++++
 testsuite/tests/typecheck/should_compile/all.T     |  1 +
 2 files changed, 13 insertions(+)

diff --git a/testsuite/tests/typecheck/should_compile/T15586.hs b/testsuite/tests/typecheck/should_compile/T15586.hs
new file mode 100644
index 0000000..e8fd4f3
--- /dev/null
+++ b/testsuite/tests/typecheck/should_compile/T15586.hs
@@ -0,0 +1,12 @@
+{-# LANGUAGE GADTs #-}
+
+module STree where
+
+data STree a where
+    STreeIM :: {
+        l :: v a ,
+        stree :: a
+    } -> STree a
+
+insert :: STree a -> STree a
+insert s = s { stree = undefined }
diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T
index 64df3a8..c3a90ee 100644
--- a/testsuite/tests/typecheck/should_compile/all.T
+++ b/testsuite/tests/typecheck/should_compile/all.T
@@ -649,3 +649,4 @@ test('T15412', normal, compile, [''])
 test('T15141', normal, compile, [''])
 test('T15473', normal, compile_fail, [''])
 test('T15499', normal, compile, [''])
+test('T15586', normal, compile, [''])