Worse, 'reify' is in many cases the very reason why folks are using template-haskell in the first place to build instances or classes based on properties of data types above the splice in the current module.

On Fri, Jan 8, 2016 at 2:40 PM, Edward Z. Yang <ezyang@mit.edu> wrote:

I implemented the refactoring to run the renamer and TH splices all
first before doing any type-checking, but actually there's a problem:
Template Haskell splices can call 'reify', which needs the type
information in order to supply the information about the identifiers
in question. I can't think of any good way around this problem.

Edward
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