Using identifiers starting with "res" in the REPL can lead to issues

[smarter]

For example:

scala> val res0 = 1 
val res0: Int = 1
scala> res0 
1 |res0
  |^^^^
  |recursive value res0 needs type

Similar issues exist in the Scala 2.12.4 REPL and in Ammonite so there's probably no easy solution here :).

[dwijnand]

No easy solution? What about using $res? Or even just a mangled name of some form? Security by obscurity, sure, but there's value in just making it harder to do the wrong thing.

[smarter]

I wouldn't want to encourage users to type identifiers with dollars in them when they want to refer to a previous line in the repl

[dwijnand]

Sorry, for some reason I thought this was about accidentally name clashing, not about referring to existing results.

[SethTisue]

as you might expect, val (res0, ...) = ... and def res0 and object res0 and var res0 and type res0 (and...?) are also affected