Just a shot in the dark, there was this thread recently: Rustler precompiled segfaults in GH action - #10 by Hermanverschooten

See if specifying Rust 1.86 (current last stable version is 1.87) helps?

Hi Dimitar

I saw this issue and I even almost fully copied some files from that repository with no luck

While writing this I’m trying to remove root Cargo.toml and Cargo.lock completely. As I remember, they were generated by mix rustler.new command. Running mix recreates Cargo.toml, but inside native/ directory.

And… it helps

I don’t think you should be removing Cargo.toml and Cargo.lock files in Rust projects though.

Also, sorry, what helps?

Removing these files helps
Root Cargo.toml had this content in my case

[workspace]
resolver = "2"

members = ["native/html2text_nif"]

Cargo.lock was recreated automatically inside native directory.
So, it is about getting rid of cargo workspace

Could you describe again the steps you took? rustler_mix intentionally creates a workspace Cargo.toml and that should result in the Cargo.lock to live on the root. No other tooling should touch this (or the workspace-less setup we had before).

/edit The error log is gone, but the error looks a bit like rustler_precompiled tries to get the compiled binaries directly from the target directory and is not aware of workspaces

I don’t remember precisely, but just removing root cargo files should do the job. Just launch mix afterwards.

I’m one of the Rustler devs and the one who modified rustler_mix to create workspaces

I’d like to fix the issue you were experiencing.

I think I found the commit on my local machine with the code that has the issue. I’ve pushed the branch to GitHub GitHub - fuelen/html2text at test_issue_with_rust_pecompiled · GitHub