Can't figure out whats wrong

[snailcatcher]

Hi there,
got this and don't get whats wrong:

ERROR [24-12-10 15:29:36:04] An unexpected error occurred:
System.InvalidOperationException: Operation is not valid due to the current state of the object.
   at GitVersion.VersionCalculation.MainlineVersionStrategy.GetCommitsWasBranchedFrom(IBranch branch, IBranch[] excludedBranches) in /_/src/GitVersion.Core/VersionCalculation/VersionSearchStrategies/MainlineVersionStrategy.cs:line 299
   at GitVersion.VersionCalculation.MainlineVersionStrategy.<>c__DisplayClass13_0.<IterateOverCommitsRecursive>b__0() in /_/src/GitVersion.Core/VersionCalculation/VersionSearchStrategies/MainlineVersionStrategy.cs:line 143
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at GitVersion.VersionCalculation.MainlineVersionStrategy.IterateOverCommitsRecursive(IEnumerable`1 commitsInReverseOrder, MainlineIteration iteration, IBranch targetBranch, String targetLabel, ILookup`2 taggedSemanticVersions, HashSet`1 traversedCommits) in /_/src/GitVersion.Core/VersionCalculation/VersionSearchStrategies/MainlineVersionStrategy.cs:line 150
   at GitVersion.VersionCalculation.MainlineVersionStrategy.IterateOverCommitsRecursive(IEnumerable`1 commitsInReverseOrder, MainlineIteration iteration, IBranch targetBranch, String targetLabel, ILookup`2 taggedSemanticVersions, HashSet`1 traversedCommits) in /_/src/GitVersion.Core/VersionCalculation/VersionSearchStrategies/MainlineVersionStrategy.cs:line 258
   at GitVersion.VersionCalculation.MainlineVersionStrategy.GetBaseVersions(EffectiveBranchConfiguration configuration)+MoveNext() in /_/src/GitVersion.Core/VersionCalculation/VersionSearchStrategies/MainlineVersionStrategy.cs:line 105
   at GitVersion.VersionCalculation.NextVersionCalculator.<>c__DisplayClass14_0.<<GetNextVersions>g__GetNextVersionsInternal|0>d.MoveNext() in /_/src/GitVersion.Core/VersionCalculation/VersionCalculators/NextVersionCalculator.cs:line 264
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at GitVersion.VersionCalculation.NextVersionCalculator.GetNextVersions(IBranch branch, IGitVersionConfiguration configuration) in /_/src/GitVersion.Core/VersionCalculation/VersionCalculators/NextVersionCalculator.cs:line 239
   at GitVersion.VersionCalculation.NextVersionCalculator.CalculateNextVersion(IBranch branch, IGitVersionConfiguration configuration) in /_/src/GitVersion.Core/VersionCalculation/VersionCalculators/NextVersionCalculator.cs:line 158
   at GitVersion.VersionCalculation.NextVersionCalculator.FindVersion() in /_/src/GitVersion.Core/VersionCalculation/VersionCalculators/NextVersionCalculator.cs:line 53
   at GitVersion.GitVersionCalculateTool.CalculateVersionVariables() in /_/src/GitVersion.Core/Core/GitVersionCalculateTool.cs:line 45
   at GitVersion.GitVersionExecutor.RunGitVersionTool(GitVersionOptions gitVersionOptions) in /_/src/GitVersion.App/GitVersionExecutor.cs:line 66
INFO [24-12-10 15:29:36:05] Please run `git log --graph --format="%h %cr %d" --decorate --date=relative --all --remotes=*` to see the git graph. This can help you troubleshoot any issues.

I use GitVersion 6.0.5.

These are the steps in my azure pipeline until this happens:

steps:
  - checkout: self
    fetchDepth: 0

  - task: gitversion/setup@3
    displayName: "Install GitVersion"
    inputs:
      versionSpec: "6.0.x" # This must be hold in sync with the version of GitVersion.MsBuild in Directory.Build.props
      includePrerelease: false
    condition: succeeded()

  - task: gitversion/execute@3 # this fails with "##[error]GitVersion output is not valid JSON"
    displayName: "Determine Version"
    condition: succeeded()

  - bash: | # this fails with the error above
      echo "GitVersion task output:"
      dotnet-gitversion /output json /outputfile $(Build.SourcesDirectory)/GitVersion.json
    displayName: 'Run GitVersion Manually'
    condition: succeededOrFailed()

My GitVersion.yml

assembly-versioning-scheme: MajorMinorPatchTag
assembly-informational-format: '{SemVer}-{ShortSha}'
mode: ContinuousDelivery
strategies:
  - Mainline
ignore:
  sha: []
merge-message-formats: {}
branches:
  master:
    label: ''
    regex: ^master$|^main$

Output of git log --graph --format="%h %cr %d" --decorate --date=relative --all --remotes=*

*   f56eca7 26 seconds ago  (HEAD -> pull/123/merge, pull/123/merge)
|\  
| * 2b7a732 31 seconds ago  (origin/ggg/vvv, ggg/vvv)
| * 9554138 11 minutes ago 
| * d321eb5 13 minutes ago 
| * dc0090e 15 minutes ago 
| * 56da7c2 16 minutes ago 
| * aa15e1e 19 minutes ago 
| * 4b80c19 24 minutes ago 
| * f0ddd46 39 minutes ago 
| * 4219a86 41 minutes ago 
| * ede5276 47 minutes ago 
| * 1e1a62e 2 hours ago 
| * 55b0736 2 hours ago 
| * 10cc3a0 2 hours ago 
| * 6be8d9d 2 hours ago 
| * e4ea75b 3 hours ago 
| * d7dca15 3 hours ago 
| * 23a0367 3 hours ago 
| * 06d2058 3 hours ago 
| * cdc6d08 3 hours ago 
| * b181e3f 4 hours ago 
| * e253233 4 hours ago 
| * 7bc9771 4 hours ago 
| * cd002b4 5 hours ago 
| * af8fb39 5 hours ago 
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| * cacc898 5 hours ago 
| * 1256494 6 hours ago 
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| * b11d22d 6 hours ago 
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| * 9465ff7 7 hours ago 
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| * b2db7bb 24 hours ago 
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| * 9098305 26 hours ago 
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| * 7b15edd 28 hours ago 
| * 4fb1447 28 hours ago 
| * 6e49548 28 hours ago 
| * f97f8ce 28 hours ago 
| * bf123eb 5 days ago 
|/  
* dd71712 5 days ago  (origin/main, main)
* b6f59fa 6 days ago 
* cd287bc 12 days ago 
* 407462e 5 weeks ago 
* 603ba0a 5 weeks ago 
* 8334e5b 5 weeks ago 
* 11f64e0 5 weeks ago 
* 49ba5ef 7 weeks ago 
* d1eecff 2 months ago 
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* 145eb95 4 months ago 
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* 5c14153 4 months ago 
* a681115 4 months ago 
*   cc575c4 4 months ago 
|\  
| * 824a744 4 months ago 
| *   eed27c2 4 months ago 
| |\  
| | * 29aa6d2 4 months ago 
| | * cec0bba 4 months ago 
| | * 6a18060 4 months ago 
| | * 192e827 4 months ago 
| | * b2cc8c1 4 months ago 
| | * 9263f93 5 months ago  (origin/bugfix/ddd, bugfix/ddd)
| | * df72526 5 months ago 
| | * a29753e 5 months ago 
| | * f7a0a0b 5 months ago  (origin/feature/fff, feature/fff)
| | *   a876c0a 5 months ago 
| | |\  
| | * | 4d54129 5 months ago 
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|/ / /  
* | | 0895201 4 months ago 
* | | 0baacf3 5 months ago 
* | | 9c9c44a 5 months ago 
| |/  
|/|   
* | 07fe08a 5 months ago 
|/  
* b9b350f 5 months ago 
| * ca7be49 5 months ago  (origin/feature/tests, feature/tests)
| * 1f948c2 5 months ago 
| * 74feb9b 5 months ago 
| * f7fb3ee 5 months ago 
|/  
* b94ffbd 5 months ago 
* 31e173e 5 months ago 
* 57424bf 5 months ago 
* 5f119ed 5 months ago 
* 4e1b72d 5 months ago 
* 43ce0b2 5 months ago  (origin/feature/abc, feature/abc)
* ec5f2da 5 months ago 
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* 220726d 5 months ago 
* 365feab 5 months ago 
* d50b28c 5 months ago 
* be8c387 5 months ago 

Before the update from 5.12 everything works fine.
Can anyone help me with this?

[HHobeck]

The problem is that some branches are set to Inherit and the algorithm cannot determine what value of is-main-branch is (because of the nature of the algorithm):

Try the TunkBased/preview1 workflow instead or change the configuration to ensure that the is-main-branch value is known.

Link [1]: https://gitversion.net/docs/reference/configuration#snippet-/docs/workflows/TrunkBased/preview1.yml