GitVersion parsing fails with error

[dennisdoomen]

Usage Information

Fallout 10.3.45 and GitVersion 6.5 or higher

Description

System.Exception: Cannot parse GitVersion from output:

Reproduction Steps

Not sure if it's consistently reproducable. But it happened in FluentAssertions

Expected Behavior

No exception

Actual Behavior

10:27:34 [WRN] Could not inject value for Build.GitVersion
System.Exception: Cannot parse GitVersion from output:
{
  "AssemblySemFileVer": "8.10.1.0",
  "AssemblySemVer": "8.10.1.0",
  "BranchName": "switch-to-fallout",
  "BuildMetaData": 7,
  "CommitDate": "2026-05-26",
  "CommitsSinceVersionSource": 7,
  "EscapedBranchName": "switch-to-fallout",
  "FullBuildMetaData": "7.Branch.switch-to-fallout.Sha.6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "FullSemVer": "8.10.1-switch-to-fallout.1+7",
  "InformationalVersion": "8.10.1-switch-to-fallout.1+7.Branch.switch-to-fallout.Sha.6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "Major": 8,
  "MajorMinorPatch": "8.10.1",
  "Minor": 10,
  "Patch": 1,
  "PreReleaseLabel": "switch-to-fallout",
  "PreReleaseLabelWithDash": "-switch-to-fallout",
  "PreReleaseNumber": 1,
  "PreReleaseTag": "switch-to-fallout.1",
  "PreReleaseTagWithDash": "-switch-to-fallout.1",
  "SemVer": "8.10.1-switch-to-fallout.1",
  "Sha": "6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "ShortSha": "6419fa5",
  "UncommittedChanges": 13,
  "VersionSourceDistance": 7,
  "VersionSourceIncrement": "None",
  "VersionSourceSemVer": "8.10.0",
  "VersionSourceSha": "0954811776a71005283221b91aabafc5fec332b7",
  "WeightedPreReleaseNumber": 1
}
 ---> System.Exception: Cannot parse GitVersion output:
{
  "AssemblySemFileVer": "8.10.1.0",
  "AssemblySemVer": "8.10.1.0",
  "BranchName": "switch-to-fallout",
  "BuildMetaData": 7,
  "CommitDate": "2026-05-26",
  "CommitsSinceVersionSource": 7,
  "EscapedBranchName": "switch-to-fallout",
  "FullBuildMetaData": "7.Branch.switch-to-fallout.Sha.6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "FullSemVer": "8.10.1-switch-to-fallout.1+7",
  "InformationalVersion": "8.10.1-switch-to-fallout.1+7.Branch.switch-to-fallout.Sha.6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "Major": 8,
  "MajorMinorPatch": "8.10.1",
  "Minor": 10,
  "Patch": 1,
  "PreReleaseLabel": "switch-to-fallout",
  "PreReleaseLabelWithDash": "-switch-to-fallout",
  "PreReleaseNumber": 1,
  "PreReleaseTag": "switch-to-fallout.1",
  "PreReleaseTagWithDash": "-switch-to-fallout.1",
  "SemVer": "8.10.1-switch-to-fallout.1",
  "Sha": "6419fa509c7934f0b34a0ea5e5306c44c0a9a259",
  "ShortSha": "6419fa5",
  "UncommittedChanges": 13,
  "VersionSourceDistance": 7,
  "VersionSourceIncrement": "None",
  "VersionSourceSemVer": "8.10.0",
  "VersionSourceSha": "0954811776a71005283221b91aabafc5fec332b7",
  "WeightedPreReleaseNumber": 1
}
 ---> System.Text.Json.JsonException: The JSON value could not be converted to Fallout.Common.Tools.GitVersion.GitVersion. Path: $.BuildMetaData | LineNumber: 4 | BytePositionInLine: 20.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'Number' as a string.
   at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedString(JsonTokenType tokenType)
   at System.Text.Json.Utf8JsonReader.GetString()
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
   at System.Text.Json.Serialization.JsonConverter`1.TryReadAsObject(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, Object& value)
   at System.Text.Json.Serialization.Converters.LargeObjectWithParameterizedConstructorConverter`1.ReadAndCacheConstructorArgument(ReadStack& state, Utf8JsonReader& reader, JsonParameterInfo jsonParameterInfo)
   at System.Text.Json.Serialization.Converters.ObjectWithParameterizedConstructorConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
   at Fallout.Common.Tooling.ProcessExtensions.StdToJson[T](IEnumerable`1 output) in /_/src/Fallout.Tooling/ProcessExtensions.cs:line 55
   at Fallout.Common.Tools.GitVersion.GitVersionTasks.GetResult[T](ToolOptions options, IReadOnlyCollection`1 output) in /_/src/Fallout.Common/Tools/GitVersion/GitVersionTasks.cs:line 21
   --- End of inner exception stack trace ---
   at Fallout.Common.Tools.GitVersion.GitVersionTasks.GetResult[T](ToolOptions options, IReadOnlyCollection`1 output) in /_/src/Fallout.Common/Tools/GitVersion/GitVersionTasks.cs:line 25
   at Fallout.Common.Tooling.ToolTasks.Run[TOptions,TResult](TOptions options) in /_/src/Fallout.Tooling/ToolTasks.Run.cs:line 49
   --- End of inner exception stack trace ---
   at Fallout.Common.Tooling.ToolTasks.Run[TOptions,TResult](TOptions options) in /_/src/Fallout.Tooling/ToolTasks.Run.cs:line 54
   at Fallout.Common.Tools.GitVersion.GitVersionTasks.GitVersion(Configure`1 configurator) in /_/src/Fallout.Common/Tools/GitVersion/GitVersion.Generated.cs:line 33
   at Fallout.Common.Tools.GitVersion.GitVersionAttribute.GetValue(MemberInfo member, Object instance) in /_/src/Fallout.Common/Tools/GitVersion/GitVersionAttribute.cs:line 46
   at Fallout.Common.ValueInjection.ValueInjectionAttributeBase.TryGetValue(MemberInfo member, Object instance) in /_/src/Fallout.Build/Execution/Extensibility/ValueInjectionAttributeBase.cs:line 23
Member 'GitVersion' is required to be not null or empty

Regression?

Unknown

Known Workarounds

Unknown

Could you help with a pull-request?

Yes