sbt project: `set every version` does not replace anything

[dansanduleac]

The sbt project itself sets a build-wide version in project/Sbt.scala.
If I set version in ThisBuild := "test", that replaces it. Good.

However, if I set every version := "test", that overrides nothing:

> set every version := "test"
[info] Defining */*:version
[info] The new value will be used by no settings or tasks.
[info] Reapplying settings...
[info] Set current project to root (in build file:/D:/work/ext/sbt/)

Is this expected behaviour?

[jsuereth]

no, I think we just ran into this again.

[cunei]

Unless I messed up the bisection, "set every" started working erratically after commit a3d89dc 322f6de

[cunei]

The definition of setAll(), which implements 'set every' uses ._1s, which just grabs the keySet from the relation's forwardMap. Hence, having a mapping from something to an empty set, or not having the mapping, is /not/ equivalent when using _1s. I am issuing a pull request to revert the optimization.