Preprocessor confused by multi-line quasiquotes with hashes at line start

Sometimes I like to generate strings by using multi-line quasiquote expressions + interpolation like this (using the interpolate package):

generatedStuff = [i|
Some static content:
#{generateStuff args}
|]

The fact that there's a # at the beginning of a line seems to confuse hlint, resulting in warnings like Warning: unknown directive #{generateStuff.

This seems related to #501, but it's a normal .hs file, not something unusual like literate Haskell. It seems like somewhere in the parsing process it's not understanding the quasiquote the way GHC does.

I confirmed that passing --cpp-simple makes the warnings go away, as that issue suggested.

Reproduce the warning with the Haskell quasiquote example, comparing normal processing with --cpp-simple. Trace HLint's preprocessing or parsing of .hs files and quasiquotes; done means the interpolation line no longer produces an unknown-directive warning without requiring --cpp-simple.