Does not work in --release builds (anymore?)

[kungfoo]

Running cargo run --release --bin job-runner I get the following error:

Job 36 failed to run: Unknown job type scale_image

Running the debug binary, everything works as expected and the job method is executed. Am I holding this wrong?

jobs::images] scale_image: from: file:///var/swirl-sample/images/c73f6708-5942-4eab-844c-dd00eaa4ff51.jpeg, to: file:///var/swirl-sample/images/scaled/c73f6708-5942-4eab-844c-dd00eaa4ff51.jpeg, dimension: Dimension { width: 400, height: 1200 }

Environment

• rustc 1.56.1 (59eed8a2a 2021-11-01)
• cargo 1.56.0 (4ed5d137b 2021-10-04)
• swirl = { git = "https://github.com/sgrif/swirl.git", branch = "master" }

[kungfoo]

I have tried to create a minimal reproduction case here: https://github.com/kungfoo/swirl-issue-25
Alas, this version (of course) works as expected for now.

What is different about my actual application, is that the code is split into seperate modules and the jobs are submitted by a rocket application via a REST interface, but the job runner sits in the same place as in this one:

jobs
├── Cargo.toml
└── src
    ├── bin
    │   └── job-runner.rs
    ├── images.rs
    └── lib.rs

There is a top-level workspace Cargo.toml one level above, that pulls all the modules together.
I'll try to adjust the repro repo accordingly.

[kungfoo]

The not-working branch now contains code that mirrors the module layout of the problematic code base: https://github.com/kungfoo/swirl-issue-25/tree/not-working

On this branch, the unexpected behaviour can be observed in a reproducible manner by running cargo run --release --bin job-runner

It appears that splitting the code into two separate modules somehow breaks it in release builds.