val 1 = 2 and other value declarations that don't declare any values confuse the REPL

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scala> { val 1 = 2 }
scala.MatchError: 2 (of class java.lang.Integer)

scala> val 1 = 2

the latter should be an error too

#4939 was closed as wontfix, but this is just the REPL piece of it, which really is a bug

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Imported From: https://issues.scala-lang.org/browse/SI-4950?orig=1
Reporter: @SethTisue

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@retronym said:
Another example from #5855:

scala> val List(1) = List(1)
<console>:5: error: value x$1 is not a member of object $iw
  lazy val $result = `x$1`

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@soc said:
Scala 2.11.1:

scala> val 1 = 2
scala.MatchError: 2 (of class java.lang.Integer)
  ... 32 elided

scala> val List(1) = List(1)

scala> 

Is there anything else expected here?

Otherwise, I'd write a PR which adds tests and close this issue.

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@retronym said:
Thanks, that is the right course of action. I think this progressed during 2a1d020..3292c4a (we are missing a few builds in the scala-bisect repo to quickly determine exactly which commit fixed it.)

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@soc said:
Ok, I'm on it!

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@soc said:
scala/scala#4072