Type Level List Parsing Error (Squeal)

[mark-keaton]

Describe the bug
I had a type defined like so, which GHCID didn't like:

getRawElementsByUserSelect :: Query '[] '[] DB '[NotNull 'PGint4] (RowPG RawElementData)

    Unticked promoted constructor: ‘NotNull’.
    Use ‘'NotNull’ instead of ‘NotNull’.

So I used GHCID's suggestion:

getRawElementsByUserSelect :: Query '[] '[] DB '[ 'NotNull 'PGint4] (RowPG RawElementData)

And Ormolu stopped formatting in place:

Parsing of formatted code failed:
  src/lib/QuerySqueal.hs<rendered>:49:46
  parse error on input '
Please, consider reporting the bug.

To Reproduce
Try formatting a Type Level list like the one above.

Expected behavior
I expected the formatter to continue to run.

Environment

• OS name + version:
  Manjaro Linux 20.0.3

• Version of the code:
  ormolu 0.1.0.0 master 033bb16
  using ghc-lib-parser 8.10.1.20200523

Additional context
Thanks. Great tool.

[mheinzel]

If I remember correctly, this is because in '['NotNull 'PGint4], '[' is parsed as a character literal. So the space is necessary in this case.

[mrkkrp]

Yes, it is a bug all right.

[andremarianiello]

I have this same issue.