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authorSimon Peyton Jones <simonpj@microsoft.com>2015-09-02 14:05:36 +0200
committerBen Gamari <bgamari.foss@gmail.com>2015-09-02 09:11:51 -0400
commit28ac9d31bcabeb44496c0e1750563f3091c62da9 (patch)
tree427a29e1beca0ee3fee7a1bc825bb5fa2fa03dae /testsuite/tests/quotes
parentc8f623e305ec0a51ac2406a1f754d244e05b96f5 (diff)
downloadhaskell-28ac9d31bcabeb44496c0e1750563f3091c62da9.tar.gz
Improve the error messages for class instance errors
Summary: See Note [Displaying potential instances]. Reviewers: austin Subscribers: KaneTW, thomie Differential Revision: https://phabricator.haskell.org/D1176
Diffstat (limited to 'testsuite/tests/quotes')
-rw-r--r--testsuite/tests/quotes/TH_localname.stderr3
1 files changed, 2 insertions, 1 deletions
diff --git a/testsuite/tests/quotes/TH_localname.stderr b/testsuite/tests/quotes/TH_localname.stderr
index a83c606eb4..76bfeea8a2 100644
--- a/testsuite/tests/quotes/TH_localname.stderr
+++ b/testsuite/tests/quotes/TH_localname.stderr
@@ -5,13 +5,14 @@ TH_localname.hs:3:11: error:
Relevant bindings include
y :: t0 (bound at TH_localname.hs:3:6)
x :: t0 -> ExpQ (bound at TH_localname.hs:3:1)
- Note: there are several potential instances:
+ Potential instances:
instance (Lift a, Lift b) => Lift (Either a b)
-- Defined in ‘Language.Haskell.TH.Syntax’
instance Lift a => Lift (Maybe a)
-- Defined in ‘Language.Haskell.TH.Syntax’
instance Lift Int16 -- Defined in ‘Language.Haskell.TH.Syntax’
...plus 24 others
+ (use -fprint-potential-instances to see them all)
In the expression: lift y
In the expression:
[| y |]