dragos/scala — comment on commit 3a3ffff684dd41b28040d20b79c951aec66914cc
File: src/compiler/scala/tools/nsc/interactive/Global.scala line 360
By odersky:

I have doubts about trhread safety. Is is not possible that the scheduler will be reassigned, yet client threads will still write into the old scheduler. I believe a flag within the scheduler itself would be a more robust solution.