v0.6-rc2 fails to precompile often

[ChrisRackauckas]

Example:

using DifferentialEquations

INFO: Recompiling stale cache file C:\Users\Chris\.julia\lib\v0.6\Combinatorics.ji for module Combinatorics.
WARNING: The call to compilecache failed to create a usable precompiled cache file for module Combinatorics. Got:
WARNING: Module Iterators uuid did not match cache file.

Combinatorics and DifferentialEquations are just fine though. And this all precompiles just fine from the REPL. Somehow Juno being involved is introducing a bunch of precompilation bugs.

[MikeInnes]

I've seen this a lot on 0.6. Must be a precomp bug but I'm not sure how to make it reproducible; if you retry it tends to go away.

[ChrisRackauckas]

if you retry it tends to go away.

I have to try it a few times in the REPL for it to go away. If I try from Juno, it will keep happening.

[MikeInnes]

In that case it'd be well worth reporting it to Base

[pfitzseb]

Seems to be fixed now.