GitHub Actions broke caching on macOS

Description

Workflow fails with error:

The same step works fine both on previous version of macos-15 runners and on ubuntu-24.04.

Platforms affected

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

Runner images affected

• Ubuntu 22.04
• Ubuntu 24.04
• Ubuntu Slim
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

Broken:

• macos-15-arm64 version 20251119.0020: https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56125544615
• macos-15 (Intel) version 20251120.0023: https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56124691970

Works:

• macos-15-arm64 version 20251104.0104: https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56124691976
• macos-15 (Intel) version 20251103.0112: https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56125544610

Is it regression?

yes

Expected behavior

hashFiles() calculates hash of files

• https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56124691976
• https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56125544610

Actual behavior

Error: The template is not valid. ... hashFiles('...') failed. Fail to hash files under directory '...'

• https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56125544615
• https://github.com/adoroszlai/ozone/actions/runs/19597747914/job/56124691970

Repro steps

See repro workflow: https://github.com/adoroszlai/ozone/actions/runs/19597747914/workflow