Iface type variable out of scope
I'm sorry for spamming code and not providing a distilled example, but honestly I have no idea how to even begin pinpointing this.
I'm writing a library and hosting it on Github: https://github.com/marcinmrotek/pipes-key-value-csv which compiles fine, but when I try to compile the test suite, GHC crashes with this error message:
/home/marcin/haskell/pipes-key-value-csv/.stack-work/dist/x86_64-linux/Cabal-22.214.171.124/build/Pipes/KeyValueCsv/Internal/KeyValue.hi Declaration for $fFromKeyValuesf:3: Iface type variable out of scope: k Cannot continue after interface file error
when I uncomment the
The thing is, this function does not even use the "FromKeyValues" type class mentioned - https://github.com/marcinmrotek/pipes-key-value-csv/blob/master/src/Pipes/KeyValueCsv/Internal/KeyValue.hs
KV.parseLine, which does, compiles fine (the test suite runs and fails with "Prelude: undefined". They're both defined here: https://github.com/marcinmrotek/pipes-key-value-csv/blob/master/src/Pipes/KeyValueCsv/KeyValue.hs
I've tried "stack clean", reinstalling both GHC and stack, installing my package globally with cabal-install (although I had to fix the validation-0.5.1 package by removing the Safe pragma; I've tried to use stack again, pointing it to the exact same code for validation-0.5.1, to no avail), the result is always the same - the library compiles, the test suite doesn't.