1955044 - Update geckodriver and deps to Rust 2024

Status: ASSIGNED

(Testing :: geckodriver, task, P3)

Description

[Henrik Skupin [:whimboo][⌚️UTC+2]]

Similar to the 2021 edition (bug 1731016) we should prepare geckodriver for the 2024 Rust edition.

For the announcement see: https://blog.rust-lang.org/2025/02/20/Rust-1.85.0.html

We probably want /have to wait a bit until Rust 1.85 is more widely used.

Folders involved for this transition are:

• https://searchfox.org/mozilla-central/source/testing/geckodriver/
• https://searchfox.org/mozilla-central/source/testing/mozbase/rust/
• https://searchfox.org/mozilla-central/source/testing/webdriver/

Comment 1

[James Graham [:jgraham]]

Attachment: Bug 1955044 - Update Geckodriver to Rust 2024,

Comment 2

[James Graham [:jgraham]]

Attachment: Bug 1955044 - Mark usage of env::set_var and env::use_var as unsafe

This usage is only in tests. It's safe as long as there's no
multi-threaded access to the environment, which we can enforce for the
tests by using a mutex so that multiple tests trying to modify the
environment don't run in parallel.

To avoid marking the actual library as unsafe, we move this code out
into a separate tests module.