Handle Errors in Repl

[MarcoPolo]

When an error is encountered it's persisted across the repl. i.e.:

> 'sad=panda

Error in repl-temp-000.elm:

Parse error at (line 2, column 3):
unexpected "a"
expecting at least one datatype or variable definition


> pwnd = True

Error in repl-temp-000.elm:

Parse error at (line 2, column 3):
unexpected "a"
expecting at least one datatype or variable definition

If you are playing around and you make a mistake you essentially have to retype and rebuild the environment.

[justinmanley]

+1. This is a minor (but consistent) irritation for me.

[justinmanley]

+1. This is a minor (but consistent) irritation for me.

[jvoigtlaender]

Move this over to the https://github.com/elm-lang/elm-repl repository? (If it is still a problem with the current version of elm-repl at all.)

[jvoigtlaender]

Move this over to the https://github.com/elm-lang/elm-repl repository? (If it is still a problem with the current version of elm-repl at all.)

[evancz]

What @jvoigtlaender said. This should be on the elm-repl repo if the problem still exists!

[evancz]

What @jvoigtlaender said. This should be on the elm-repl repo if the problem still exists!