diff options
| author | Ryan Scott <ryan.gl.scott@gmail.com> | 2018-01-21 12:06:06 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2018-01-21 12:06:07 -0500 |
| commit | 0074a08ea9dfd1416aa57a9504be73dcdf7a1e2b (patch) | |
| tree | af5e2f5873f3ef7643caa3af4e24733bca6dba21 /testsuite/tests/deriving | |
| parent | 765ba657c08453615521f5cb0b2418512e606743 (diff) | |
| download | haskell-0074a08ea9dfd1416aa57a9504be73dcdf7a1e2b.tar.gz | |
Fix #14692 by correcting an off-by-one error in TcGenDeriv
A silly mistake in `gen_Show_binds` was causing derived
`Show` instances for empty data types to case on the precedence
argument instead of the actual value being showed.
Test Plan: make test TEST=drv-empty-data
Reviewers: bgamari
Reviewed By: bgamari
Subscribers: rwbarton, thomie, carter
GHC Trac Issues: #14692
Differential Revision: https://phabricator.haskell.org/D4328
Diffstat (limited to 'testsuite/tests/deriving')
| -rw-r--r-- | testsuite/tests/deriving/should_compile/drv-empty-data.stderr | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/testsuite/tests/deriving/should_compile/drv-empty-data.stderr b/testsuite/tests/deriving/should_compile/drv-empty-data.stderr index e131c1cf5b..5baf6a6c6e 100644 --- a/testsuite/tests/deriving/should_compile/drv-empty-data.stderr +++ b/testsuite/tests/deriving/should_compile/drv-empty-data.stderr @@ -7,7 +7,7 @@ Derived class instances: GHC.Read.readListPrec = GHC.Read.readListPrecDefault instance GHC.Show.Show (DrvEmptyData.Void a) where - GHC.Show.showsPrec z = case z of + GHC.Show.showsPrec _ z = case z of instance GHC.Classes.Ord (DrvEmptyData.Void a) where GHC.Classes.compare _ z = GHC.Types.EQ |