When compiling 0.6 on Windows with GHC 8.6.3, the compilation hangs while trying to compile Database.PostgreSQL.Simple.FromField.

It compiles fine with GHC 8.6.2.

The module where it fails contains TH splices. So we suspect this might be caused by GHC bug #16057, which was introduced in GHC 8.6.3 and will be fixed in 8.6.4. This behavior is similar to what happens with other packages that are affected by this bug, such as yesodweb/shakespeare#233.