blob: 88469939f3189a483f7c300e4a04ed02fac893d7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
tcfail198.hs:6:36: error:
• Couldn't match expected type ‘a2’ with actual type ‘a1’
because type variable ‘a2’ would escape its scope
This (rigid, skolem) type variable is bound by
an expression type signature:
a2
at tcfail198.hs:6:36-41
• In the expression: x :: a
In the second argument of ‘(++)’, namely ‘[x :: a]’
In the expression: xs ++ [x :: a]
• Relevant bindings include
xs :: [a1] (bound at tcfail198.hs:6:21)
x :: a1 (bound at tcfail198.hs:6:19)
f3 :: [a1] -> [a1] (bound at tcfail198.hs:6:6)
|
