Julia 1.8: ChainRules does not have Adapt in its dependencies

General Usage
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1

I’m working on a codebase I’ve inherited. It runs completely fine in Julia 1.7

However, if I run identical code in Julia 1.8, I get the following error message

ERROR: LoadError: ArgumentError: Package ChainRules does not have Adapt in its dependencies:
- You may have a partially installed environment. Try `Pkg.instantiate()`
  to ensure all packages in the environment are installed.
- Or, if you have ChainRules checked out for development and have
  added Adapt as a dependency but haven't updated your primary
  environment's manifest file, try `Pkg.resolve()`.
- Otherwise you may need to report an issue with ChainRules
Stacktrace:
 [1] macro expansion
   @ ./loading.jl:1167 [inlined]
 [2] macro expansion
   @ ./lock.jl:223 [inlined]
 [3] require(into::Module, mod::Symbol)
   @ Base ./loading.jl:1144
 [4] include
   @ ./Base.jl:419 [inlined]
 [5] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
   @ Base ./loading.jl:1554
 [6] top-level scope
   @ stdin:1
in expression starting at /Users/user/.julia/packages/ChainRules/kZnzE/src/ChainRules.jl:1
in expression starting at stdin:1

I’m not finding anything super helpful online (I think because version 1.8 just came out), and so any pointers in the right direction would be very appreciated!

2

Can you share the output of Pkg.status()?
( And just to be sure, did you run Pkg.instantiate()? )

3

I have tried the recommendations given to me by the error message (e.g. Pkg.instantiate()) but I’m getting the same error.

Here is the output of Pkg.status()

Status `~/.julia/environments/v1.8/Project.toml`
  [587475ba] Flux v0.13.5
⌃ [c3e4b0f8] Pluto v0.19.4
Info Packages marked with ⌃ have new versions available
4

OK, apparently what I needed to update was the dev environment.

But what exactly is this environment?

5

The dev environment is a local copy of a package, which allows you to change the package locally for yourself. 3. Managing Packages · Pkg.jl
Normally you should not need to use a dev environment if you are just using packages.
There is the pkg> free PackageName command to use the registered version again.

Does the project have a Project.toml file? It looks like you are working in the global environment (@v1.8). Maybe what was missing was to activate the project environment (i.e. in package mode, call pkg> activate .)

By the way, there was recently this post with a nice detailed tutorial on Pkg: jkrumbiegel.com - Pkg.jl and Julia Environments for Beginners

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