DictChannel not defined error

[tkelman]

Happens once in a while, I think I may have caused this actually in https://github.com/JuliaLang/julia/pull/15263/files#diff-58423af65cdd8c791e6fad72e0524984 - but why would myid() sometimes not return the right thing? Or is there a race condition?

example cases: https://ci.appveyor.com/project/JuliaLang/julia/build/1.0.792/job/sxyalbspyv27fcs2
https://ci.appveyor.com/project/JuliaLang/julia/build/1.0.776/job/jj6iyr4w22kdupi4
https://ci.appveyor.com/project/JuliaLang/julia/build/1.0.770/job/8ftjs48560jpbdh8
https://ci.appveyor.com/project/JuliaLang/julia/build/1.0.760/job/nm0icqna2eyrwpu8

[amitmurthy]

The change seems harmless.....I would suspect a race condition. Any recent changes to the code loading logic for Windows?

[amitmurthy]

Is there a way to search all AV logs under Julia for "LoadError: UndefVarError: DictChannel not defined" to find the earliest logged instance on this error?

[tkelman]

I believe so, there is an API reference at http://www.appveyor.com/docs/api/projects-builds though our history before we switched from the StefanKarpinski account to the JuliaLang account was unfortunately deleted.

[tkelman]

might have something to do with heavy load, it happened on an osx buildbot: https://build.julialang.org/builders/build_osx10.9-x64/builds/705/steps/shell_2/logs/stdio

[amitmurthy]

Unless code loading has an asynchronous part that completes after include returns, I don't see an obvious reason for this error to occur. I propose merging #16095 and seeing if it helps identify the cause.

[vtjnash]

I tried to queue a few more builds, but it looks like Appveyor's configuration is broken right now

[tkelman]

Doesn't include do something funny now in case the file gets modified while running? Nothing should be getting modified here but maybe the workaround for that is causing issues.

[vtjnash]

https://travis-ci.org/JuliaLang/julia/jobs/127403744

[tkelman]

should've merged #16095 a little earlier, that merge commit was on 0821d57 so just missed it