GHCI character limit?

Question

I'm using ghci to do some incremental development using Emacs' run-haskell. Every once in a while, I get an error that looks like

<interactive>:[line]:[character]: _Lexical error at character '\EOT'

Setting up an intermediate variable or two gets a working response, and the file I'm working on both loads and compiles properly. Reducing character count also works; the max I seem to be able to hit is 252.

Anyone have an idea of what's going on?

Answer 1

This was filed and closed as a bug in GHC several years ago, so looks like no dice on fixing it at the GHCi end. (Searching "_Lexical error at character '\EOT'" gives a few other results (for example), but I can't work out how applicable they are.)