Bump `base` version to 4.9.0.0 (closes #11026)
[ghc.git] / testsuite / tests / typecheck / should_fail / tcfail128.stderr
1
2 tcfail128.hs:18:16: error:
3     Ambiguous type variable ‘b0’ arising from a use of ‘thaw’
4     prevents the constraint ‘(Data.Array.Base.MArray
5                                 b0 FlatVector IO)’ from being solved.
6     Probable fix: use a type annotation to specify what ‘b0’ should be.
7     These potential instance exist:
8       instance Data.Array.Base.MArray IOArray e IO
9         -- Defined in ‘Data.Array.Base’
10     In a stmt of a 'do' block: v <- thaw tmp
11     In the expression:
12       do { let sL = ...
13                dim = length sL
14                ....;
15            v <- thaw tmp;
16            return () }
17     In an equation for ‘main’:
18         main
19           = do { let sL = ...
20                      ....;
21                  v <- thaw tmp;
22                  return () }