Commit 1e4335ae authored by's avatar
Browse files

typecheck/FD3: revert to error msg of previous version ofthe compiler

parent e8d8c2e9
......@@ -2,13 +2,6 @@
-- Trac #1795
-- This should fail. It used to fail saying it can't unify
-- 'a' with '(String, a)'
-- but now it simply says that it can't deduce
-- (MkA (String, a) a) from the context ()
-- which is fair enough
module ShouldCompile where
data A a = A
Could not deduce (MkA (String, a) a) from the context ()
arising from a use of `mkA' at FD3.hs:22:14-18
Possible fix:
add (MkA (String, a) a) to the context of
the type signature for `translate'
or add an instance declaration for (MkA (String, a) a)
In the expression: mkA a
In the definition of `translate': translate a = mkA a
Occurs check: cannot construct the infinite type: a = (String, a)
When generalising the type(s) for `translate'
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