sbt bug 4125

See sbt/sbt#4125 for context.

steps

Open a shell and

git checkout "x=1"

Now run sbt on a different shell and do ~test. Once it runs for the first time,

git checkout "x=2"

Take a look at the test passing, and the definitions of x and y.

Problem

Incremental compilation when used together with the optimizer generates incorrect bytecode: modifications in methods/vals are not propagated to wherever they are being inlined.

Expectation

The incremental compiler should not ever generate incorrect bytecode.

Version

sbt 1.1.0 most likely previous ones too.