[BUG] Compile error with Rust 1.55.0 (stable)

[sjames]

Describe the bug
I checked out the fog05 repository and tried to build it on Ubuntu 20.04. shared_memory v 0.11.4 fails to compile. This package is a dependency of zenoh.

Compiling shared_memory v0.11.4 error[E0164]: expected tuple struct or tuple variant, found associated functionnix::Error::Sys--> /home/sjames/.cargo/registry/src/github.com-1ecc6299db9ec823/shared_memory-0.11.4/src/unix.rs:87:13 | 87 | Err(nix::Error::Sys(Errno::EEXIST)) => return Err(ShmemError::MappingIdExists), | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^fn` calls are not allowed in patterns
|
= help: for more information, visit https://doc.rust-lang.org/book/ch18-00-patterns.html

`
To Reproduce
Steps to reproduce the behavior:

1. Check out fog05 github repo
2. cargo build

Expected behavior
Build must succeed

Desktop (please complete the following information):

• OS: Linux
• Version Ubuntu 20.04

[gabrik]

Hi @sjames,

Eclipse fog05 does not build with rust stable it requires nightly

rustup default nightly
cargo update
cargo build --all-targets

This was tested on an Ubuntu 20.04 and was working

[sjames]

@gabrik . I tried this just now , but had the same error. I also realized that I have Ubuntu 18.04 on this computer, sorry about saying I was using 20.04.

Which version of nightly are you using?

[gabrik]

It seems it is getting the wrong version of the shared_memory crate, in some Linux installations.

I'll give a deeper look and come back with a solution/PR.

[gabrik]

It should be solved now, please let me know and reopen this issue if necessary

[sjames]

Thank you. It builds now.