"Can't find an implementation for Range Type"

[Pytheas01]

If possible, please include complete self contained source files (for example by uploading to https://gist.github.com) that exhibit the issue in addition to quoting from them here. The smaller the example the better!

Steps to Reproduce

[ [(i,0),(0,i)] | i <- [1..10] ] in Idris REPL

Expected Behavior

[[(1, 0), (0, 1)],
 [(2, 0), (0, 2)],
 [(3, 0), (0, 3)],
 [(4, 0), (0, 4)],
 [(5, 0), (0, 5)],
 [(6, 0), (0, 6)],
 [(7, 0), (0, 7)],
 [(8, 0), (0, 8)],
 [(9, 0), (0, 9)],
 [(10, 0), (0, 10)]] : List (List (Integer, Integer))

Observed Behavior

(interactive):1:24--1:32:Can't find an implementation for Range Type

[gallais]

The issue is that (a, b) can stand both for the pair type of a & b or the
pair of values a & b whose type is a pair type. Idris disambiguates to the
wrong thing it seems.

If you explicitly annotate i by using the, you get the result you were
expecting: [ [(0, the Integer i), (i, 0)] | i <- [1..10] ].

Worth noting that Idris 1 does get this one right.

[edwinb]

Idris 1 works a bit harder to disambiguate, but there should at least be an error message that explains what the ambiguity is.