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[GH-ISSUE #885] Issue: zero value panic in matrix workflow #527

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opened 2026-03-01 21:44:11 +03:00 by kerem · 5 comments

kerem commented

2026-03-01 21:44:11 +03:00

Owner

Originally created by @marscher on GitHub (Nov 16, 2021).
Original GitHub issue: https://github.com/nektos/act/issues/885

System information

Operating System: Arch Linux
Architecture: amd64
Docker version: 20.10.10, build b485636f4b
Docker image used in act:
act version: 0.2.24

Expected behaviour

Be able to run a single workflow.

Actual behaviour

When executing act on this repo's ()workflows, I receive the following stack trace, right after image selection (large). On another less complicated matrix the act installation works like a charm, so I suspect it has something to do with the contained workflow matrix.

Workflow and/or repository

github.com/BAMWelDX/weldx@23ad669b93

`act` output

Log

DEBU[0000] Loading slug from git directory '/home/marscher/sources/weldx/.git' 
DEBU[0000] Found revision: 23ad669b938864ef1b6a806b26964843cccc28da 
DEBU[0000] Loading revision from git directory '/home/marscher/sources/weldx/.git' 
DEBU[0000] Found revision: 23ad669b938864ef1b6a806b26964843cccc28da 
DEBU[0000] HEAD points to '23ad669b938864ef1b6a806b26964843cccc28da' 
DEBU[0000] using github ref: refs/heads/master          
DEBU[0000] context env => map[ACT:true]                 
DEBU[0000] context needs => map[]                       
panic: reflect: call of reflect.Value.Type on zero Value

goroutine 1 [running]:
reflect.Value.Type({0x0, 0x0, 0x101000000000000})
        reflect/value.go:2249 +0x12e
github.com/nektos/act/pkg/model.(*Job).Matrix(0xc0005d5988)
        github.com/nektos/act/pkg/model/workflow.go:178 +0xd6
github.com/nektos/act/pkg/model.(*Job).GetMatrixes(0xc0001f4c00)
        github.com/nektos/act/pkg/model/workflow.go:200 +0x67
github.com/nektos/act/pkg/runner.(*runnerImpl).NewPlanExecutor(0xc00000f710, 0xc00000ec30)
        github.com/nektos/act/pkg/runner/runner.go:119 +0x2b9
github.com/nektos/act/cmd.newRunCommand.func1(0xc000496000, {0xc0004d6000, 0x0, 0x10})
        github.com/nektos/act/cmd/root.go:290 +0xa79
github.com/spf13/cobra.(*Command).execute(0xc000496000, {0xc000498300, 0x9, 0x10})
        github.com/spf13/cobra@v1.1.1/command.go:850 +0x60e
github.com/spf13/cobra.(*Command).ExecuteC(0xc000496000)
        github.com/spf13/cobra@v1.1.1/command.go:958 +0x3ad
github.com/spf13/cobra.(*Command).Execute(...)
        github.com/spf13/cobra@v1.1.1/command.go:895
github.com/nektos/act/cmd.Execute({0x561d59046880, 0xc0003e0600}, {0x561d58eab808, 0x6})
        github.com/nektos/act/cmd/root.go:71 +0xae6
main.main()
        github.com/nektos/act/main.go:33 +0x171

Originally created by @marscher on GitHub (Nov 16, 2021). Original GitHub issue: https://github.com/nektos/act/issues/885  ## System information  - Operating System: Arch Linux - Architecture: amd64 - Docker version: 20.10.10, build b485636f4b - Docker image used in `act`: - `act` version: 0.2.24 ## Expected behaviour Be able to run a single workflow. ## Actual behaviour When executing act on this repo's ()workflows, I receive the following stack trace, right after image selection (large). On another less complicated matrix the act installation works like a charm, so I suspect it has something to do with the contained workflow matrix. ## Workflow and/or repository https://github.com/BAMWelDX/weldx/commit/23ad669b938864ef1b6a806b26964843cccc28da  ## `act` output  <details> <summary>Log</summary> ```none DEBU[0000] Loading slug from git directory '/home/marscher/sources/weldx/.git' DEBU[0000] Found revision: 23ad669b938864ef1b6a806b26964843cccc28da DEBU[0000] Loading revision from git directory '/home/marscher/sources/weldx/.git' DEBU[0000] Found revision: 23ad669b938864ef1b6a806b26964843cccc28da DEBU[0000] HEAD points to '23ad669b938864ef1b6a806b26964843cccc28da' DEBU[0000] using github ref: refs/heads/master DEBU[0000] context env => map[ACT:true] DEBU[0000] context needs => map[] panic: reflect: call of reflect.Value.Type on zero Value goroutine 1 [running]: reflect.Value.Type({0x0, 0x0, 0x101000000000000}) reflect/value.go:2249 +0x12e github.com/nektos/act/pkg/model.(*Job).Matrix(0xc0005d5988) github.com/nektos/act/pkg/model/workflow.go:178 +0xd6 github.com/nektos/act/pkg/model.(*Job).GetMatrixes(0xc0001f4c00) github.com/nektos/act/pkg/model/workflow.go:200 +0x67 github.com/nektos/act/pkg/runner.(*runnerImpl).NewPlanExecutor(0xc00000f710, 0xc00000ec30) github.com/nektos/act/pkg/runner/runner.go:119 +0x2b9 github.com/nektos/act/cmd.newRunCommand.func1(0xc000496000, {0xc0004d6000, 0x0, 0x10}) github.com/nektos/act/cmd/root.go:290 +0xa79 github.com/spf13/cobra.(*Command).execute(0xc000496000, {0xc000498300, 0x9, 0x10}) github.com/spf13/cobra@v1.1.1/command.go:850 +0x60e github.com/spf13/cobra.(*Command).ExecuteC(0xc000496000) github.com/spf13/cobra@v1.1.1/command.go:958 +0x3ad github.com/spf13/cobra.(*Command).Execute(...) github.com/spf13/cobra@v1.1.1/command.go:895 github.com/nektos/act/cmd.Execute({0x561d59046880, 0xc0003e0600}, {0x561d58eab808, 0x6}) github.com/nektos/act/cmd/root.go:71 +0xae6 main.main() github.com/nektos/act/main.go:33 +0x171 ``` </details>

kerem

2026-03-01 21:44:11 +03:00

closed this issue
added the
kind/bug

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kerem commented

2026-03-01 21:44:12 +03:00

Author

Owner

@catthehacker commented on GitHub (Nov 16, 2021):

Issue is fixed in master branch

@catthehacker commented on GitHub (Nov 16, 2021): Issue is fixed in master branch ![image](https://user-images.githubusercontent.com/31106839/141971195-c25b3ba5-185c-415d-ac62-88a0291d2a47.png)

kerem commented

2026-03-01 21:44:12 +03:00

Author

Owner

@marscher commented on GitHub (Nov 16, 2021):

Thanks, I should have tested the master version. Sry for wasting your time.

@marscher commented on GitHub (Nov 16, 2021): Thanks, I should have tested the master version. Sry for wasting your time.

kerem commented

2026-03-01 21:44:12 +03:00

Author

Owner

@catthehacker commented on GitHub (Nov 16, 2021):

Ok, finally found the issue
Duplicate of https://github.com/nektos/act/issues/760

@catthehacker commented on GitHub (Nov 16, 2021): Ok, finally found the issue Duplicate of https://github.com/nektos/act/issues/760

kerem commented

2026-03-01 21:44:12 +03:00

Author

Owner

@marscher commented on GitHub (Nov 16, 2021):

eventually it is worth releasing this fix?

@marscher commented on GitHub (Nov 16, 2021): eventually it is worth releasing this fix?

kerem commented

2026-03-01 21:44:12 +03:00

Author

Owner

@catthehacker commented on GitHub (Nov 16, 2021):

@marscher yes but that is up to project owner, I can't do it myself

@catthehacker commented on GitHub (Nov 16, 2021): @marscher yes but that is up to project owner, I can't do it myself

kerem referenced this issue

2026-03-01 21:51:38 +03:00

[PR #665] [MERGED] Add custom docker registry authentication #1546

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[GH-ISSUE #885] Issue: zero value panic in matrix workflow #527

System information

Expected behaviour

Actual behaviour

Workflow and/or repository

act output

`act` output