Description

Mac OS runner with bash -el {0} overwrites existing PATH

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• Windows Server 2019
• Windows Server 2022

Image version and build link

20240911.3

https://github.com/hoxbro/example-repo/actions/runs/10879060685/job/30183040885

Is it regression?

yes, 20240903.5

Expected behavior

It should only append to PATH

Actual behavior

Using bash -el {0} overwrites existing PATH. This started happening with 20240911.3, because of this line:

PATH="/opt/homebrew/bin:/opt/homebrew/sbin:/Users/runner/.cargo/bin:/usr/local/opt/curl/bin:/usr/local/bin:/usr/local/sbin:/Users/runner/bin:/Users/runner/.yarn/bin:/Users/runner/Library/Android/sdk/tools:/Users/runner/Library/Android/sdk/platform-tools:/Library/Frameworks/Python.framework/Versions/Current/bin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin"; export PATH;

Repro steps

I have an MRE repo here: https://github.com/hoxbro/example-repo/actions/runs/10879060685. This used to work on macOS and currently works on Windows and Linux.