blob: 529751c2d3379d2ae1422c21ae44595b7619749e (
plain)
1
2
3
4
5
6
7
8
9
10
11
|
T5287.hs:6:10:
Could not deduce (A a oops0)
from the context: A a oops
bound by an instance declaration: A a oops => Read (D a)
at T5287.hs:6:10-31
The type variable ‘oops0’ is ambiguous
In the ambiguity check for an instance declaration:
forall a oops. A a oops => Read (D a)
To defer the ambiguity check to use sites, enable AllowAmbiguousTypes
In the instance declaration for ‘Read (D a)’
|
