Impredicativity bug: Church2 test gives a rather confusing error with the HEAD
The Church2 test gives a rather confusing error with the HEAD:
Church2.hs:27:14:
Couldn't match expected type `CNat'
against inferred type `(a -> a) -> a -> a'
Expected type: CNat -> CNat
Inferred type: CNat -> CNat
In the first argument of `n', namely `(mul m)'
In the expression: n (mul m) n1
In particular the lines
Expected type: CNat -> CNat
Inferred type: CNat -> CNat
are confusing, and I'm not sure why it's giving two expected/inferred pairs of types.
Trac metadata
Trac field | Value |
---|---|
Version | 6.7 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |