[GH-ISSUE #5971] Inconsistent results when using multiple runners in a matrix #1306

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opened 2026-03-01 21:50:16 +03:00 by kerem · 0 comments

kerem commented

2026-03-01 21:50:16 +03:00

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Originally created by @syan212 on GitHub (Nov 21, 2025).
Original GitHub issue: https://github.com/nektos/act/issues/5971

Bug report info

act version:            0.2.82
GOOS:                   linux
GOARCH:                 amd64
NumCPU:                 14
Docker host:            DOCKER_HOST environment variable is not set
Sockets found:
        /var/run/docker.sock
Config files:
        /home/syan235711/.config/act/actrc:
                -P ubuntu-latest=catthehacker/ubuntu:act-latest
                -P ubuntu-22.04=catthehacker/ubuntu:act-22.04
                -P ubuntu-20.04=catthehacker/ubuntu:act-20.04
                -P ubuntu-18.04=catthehacker/ubuntu:act-18.04
Build info:
        Go version:            go1.24.0
        Module path:           github.com/nektos/act
        Main version:          v0.2.82
        Main path:             github.com/nektos/act
        Main checksum:
        Build settings:
                -buildmode:           exe
                -compiler:            gc
                -ldflags:             -s -w -X main.version=0.2.82 -X main.commit=3d71542867d7cbdac6a75e540be6f64362e94de2 -X main.date=2025-10-01T02:36:39Z -X main.builtBy=goreleaser
                CGO_ENABLED:          0
                GOARCH:               amd64
                GOOS:                 linux
                GOAMD64:              v1
                vcs:                  git
                vcs.revision:         3d71542867d7cbdac6a75e540be6f64362e94de2
                vcs.time:             2025-10-01T02:36:13Z
                vcs.modified:         false
Docker Engine:
        Engine version:        28.5.1
        Engine runtime:        runc
        Cgroup version:        2
        Cgroup driver:         cgroupfs
        Storage driver:        overlayfs
        Registry URI:          https://index.docker.io/v1/
        OS:                    Docker Desktop
        OS type:               linux
        OS version:
        OS arch:               x86_64
        OS kernel:             6.6.87.2-microsoft-standard-WSL2
        OS CPU:                14
        OS memory:             15742 MB
        Security options:
                name=seccomp,profile=builtin
                name=cgroupns

Command used with act

act

Describe issue

Sometimes it works, but other times it fails and reports that all 3 runners are unsupported, despite ubuntu clearly being supported. This seems to be a slightly bigger issue with some larger workflows

Link to GitHub repository

No response

Workflow content

name: Inconsistent results

on:
  push:
    branches:
      - main


jobs:
  Job:
    runs-on: ${{ matrix.platform }}
    strategy:
      matrix:
        platform: [windows-latest, macos-latest, ubuntu-latest]

    steps:
      - name: Sometimes works
        run: |
          echo "Worked"

Relevant log output

When it fails:

[Inconsistent results/Job-1] 🚧  Skipping unsupported platform -- Try running with `-P windows-latest=...`
[Inconsistent results/Job-3] 🚧  Skipping unsupported platform -- Try running with `-P windows-latest=...`
[Inconsistent results/Job-2] 🚧  Skipping unsupported platform -- Try running with `-P macos-latest=...`

When it succeeds:

[Inconsistent results/Job-3] ⭐ Run Set up job
[Inconsistent results/Job-2] 🚧  Skipping unsupported platform -- Try running with `-P ubuntu-latest=...`
[Inconsistent results/Job-1] 🚧  Skipping unsupported platform -- Try running with `-P ubuntu-latest=...`
[Inconsistent results/Job-3] 🚀  Start image=catthehacker/ubuntu:act-latest
[Inconsistent results/Job-3]   🐳  docker pull image=catthehacker/ubuntu:act-latest platform= username= forcePull=true

Additional information

No response

Originally created by @syan212 on GitHub (Nov 21, 2025). Original GitHub issue: https://github.com/nektos/act/issues/5971 ### Bug report info ```plain text act version: 0.2.82 GOOS: linux GOARCH: amd64 NumCPU: 14 Docker host: DOCKER_HOST environment variable is not set Sockets found: /var/run/docker.sock Config files: /home/syan235711/.config/act/actrc: -P ubuntu-latest=catthehacker/ubuntu:act-latest -P ubuntu-22.04=catthehacker/ubuntu:act-22.04 -P ubuntu-20.04=catthehacker/ubuntu:act-20.04 -P ubuntu-18.04=catthehacker/ubuntu:act-18.04 Build info: Go version: go1.24.0 Module path: github.com/nektos/act Main version: v0.2.82 Main path: github.com/nektos/act Main checksum: Build settings: -buildmode: exe -compiler: gc -ldflags: -s -w -X main.version=0.2.82 -X main.commit=3d71542867d7cbdac6a75e540be6f64362e94de2 -X main.date=2025-10-01T02:36:39Z -X main.builtBy=goreleaser CGO_ENABLED: 0 GOARCH: amd64 GOOS: linux GOAMD64: v1 vcs: git vcs.revision: 3d71542867d7cbdac6a75e540be6f64362e94de2 vcs.time: 2025-10-01T02:36:13Z vcs.modified: false Docker Engine: Engine version: 28.5.1 Engine runtime: runc Cgroup version: 2 Cgroup driver: cgroupfs Storage driver: overlayfs Registry URI: https://index.docker.io/v1/ OS: Docker Desktop OS type: linux OS version: OS arch: x86_64 OS kernel: 6.6.87.2-microsoft-standard-WSL2 OS CPU: 14 OS memory: 15742 MB Security options: name=seccomp,profile=builtin name=cgroupns ``` ### Command used with act ```sh act ``` ### Describe issue Sometimes it works, but other times it fails and reports that all 3 runners are unsupported, despite ubuntu clearly being supported. This seems to be a slightly bigger issue with some larger workflows ### Link to GitHub repository _No response_ ### Workflow content ```yml name: Inconsistent results on: push: branches: - main jobs: Job: runs-on: ${{ matrix.platform }} strategy: matrix: platform: [windows-latest, macos-latest, ubuntu-latest] steps: - name: Sometimes works run: | echo "Worked" ``` ### Relevant log output When it fails: ```sh [Inconsistent results/Job-1] 🚧 Skipping unsupported platform -- Try running with `-P windows-latest=...` [Inconsistent results/Job-3] 🚧 Skipping unsupported platform -- Try running with `-P windows-latest=...` [Inconsistent results/Job-2] 🚧 Skipping unsupported platform -- Try running with `-P macos-latest=...` ``` When it succeeds: ```sh [Inconsistent results/Job-3] ⭐ Run Set up job [Inconsistent results/Job-2] 🚧 Skipping unsupported platform -- Try running with `-P ubuntu-latest=...` [Inconsistent results/Job-1] 🚧 Skipping unsupported platform -- Try running with `-P ubuntu-latest=...` [Inconsistent results/Job-3] 🚀 Start image=catthehacker/ubuntu:act-latest [Inconsistent results/Job-3] 🐳 docker pull image=catthehacker/ubuntu:act-latest platform= username= forcePull=true ``` ### Additional information _No response_