Why am I unable to precompile my project?

kannan975 · January 31, 2023, 5:28pm

Hi,
I am quite new to Julia and I am trying to working on and developing a package that my colleague has made.

Following the instructions on pkgdocs, I used dev to clone the project followed by activate . and instantiate

When I tried to instantiate I got the first error:

Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to Pkg.resolve() or consider Pkg.update() if necessary.
└ @ Pkg.API C:\workdir\usr\share\julia\stdlib\v1.8\Pkg\src\API.jl:1535
ERROR: Interpolations is a direct dependency, but does not appear in the manifest. If you intend Interpolations to be a direct dependency, run Pkg.resolve()

After performing Pkg.resolve(), upon trying to instatitate again it fails to precompile.

Any help would be appreciated
I am using Windows 11 and Julia 1.8.5 (same issue happened on v1.8.3)

mkitti · January 31, 2023, 5:33pm

I would focus on this error now : UndefVarError: Event is not defined. Look through your colleague’s code. How is Event supposed to be defined?

kannan975 · January 31, 2023, 5:44pm

It is defined as mutable struct Event

The project seems to be working perfectly fine for him.

jling · January 31, 2023, 5:52pm

is BosonSampling.jl a github repo we can take a look?

mkitti · January 31, 2023, 6:23pm

This one perhaps?

mkitti · January 31, 2023, 6:55pm

Eight days ago your colleague made this commit introducing a reference to Event in measurement.jl:

However, in types.jl, measurements.jl is loaded before events.jl.

github.com

benoitseron/BosonSampling.jl/blob/4ea000d252e7e3da26c3b003c77c962d22240aa9/src/types/types.jl#L7-L8


      
          include("measurements.jl")
          include("events.jl")

The code in measurements.jl does not know about the mutable struct declared in events.jl. The solution to this is to move all the type declarations to a file included before all the function definitions.

A simple solution for now is to move possible_threshold_detections to events.jl instead of measurements.jl

github.com

benoitseron/BosonSampling.jl/blob/4ea000d252e7e3da26c3b003c77c962d22240aa9/src/types/measurements.jl#L63-L78


      
          # write possible_threshold_detections for an Event
          # extract n from the input_state
          
          function possible_threshold_detections(ev::Event)
          
              # check that the output_measurement is a ThresholdFockDetection
          
              @argcheck ev.output_measurement isa ThresholdFockDetection
          
              lossy = is_lossy(ev.interferometer)
          
              n = ev.input_state.r.n
          
              possible_threshold_detections(n,ev.output_measurement, lossy = lossy)
          
          end

mkitti · January 31, 2023, 6:58pm

Look what I found in events.jl:

github.com

benoitseron/BosonSampling.jl/blob/4ea000d252e7e3da26c3b003c77c962d22240aa9/src/types/events.jl#L146-L159


      
          # write possible_threshold_detections for an Event
          # extract n from the input_state
          
          
function possible_threshold_detections(ev::Event)
          
          
    # check that the output_measurement is a ThresholdFockDetection
          
          
    @argcheck ev.output_measurement isa ThresholdFockDetection
          
          
    n = ev.input_state.r.n
          
          
    possible_threshold_detections(n,ev.output_measurement)
          
          
end

It looks to me like your colleague forgot to commit one or more files. It does not make sense for possible_threshold_detections(ev::Event) to be defined twice.

kannan975 · January 31, 2023, 8:54pm

Yes! That was indeed the problem. I guess it wasn’t a Julia problem after all, but a little software development bug.

Thanks a lot for quickly troubleshooting it @mkitti