D1182: Implement improved error messages for ambiguous type variables (#10733)

[Ben Gamari]

Jan Stolarek <jan.stolarek at p.lodz.pl> writes:

>> In general we shouldn't commit anything that breaks validate, because
>> this causes problems for other developers.  The right thing to do would
>> be to mark it expect_broken before committing.
> 
> Sorry for that. I was actually thinking about marking the test as
> expect_broken, but then the problem would be completely hidden> I
> wanted to discuss a possible solution with Simon and Edward first but
> it looks like Thomas already found a workaround.
>
Hiding the issue isn't a problem so long as there is a ticket opened to
describe the brokeness (and discuss potential solutions).

Cheers,

- Ben

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