Fix issue 1634 (#1635)

Co-authored-by: David Mueller x <[email protected]>

Documentation/Changelog.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Fixed
+- Threshold-stat triggers error [#1634](https://github.com/coverlet-coverage/coverlet/issues/1634)
 - Exception when multiple exclude-by-attribute filters specified [#1624](https://github.com/coverlet-coverage/coverlet/issues/1624)
 
 ### Improvements

src/coverlet.console/Program.cs

@@ -35,7 +35,7 @@ static int Main(string[] args)
       var formats = new Option<string[]>(new[] { "--format", "-f" }, () => new[] { "json" }, "Format of the generated coverage report.") { Arity = ArgumentArity.ZeroOrMore, AllowMultipleArgumentsPerToken = true };
       var threshold = new Option<string>("--threshold", "Exits with error if the coverage % is below value.") { Arity = ArgumentArity.ZeroOrOne };
       var thresholdTypes = new Option<List<string>>("--threshold-type", () => new List<string>(new string[] { "line", "branch", "method" }), "Coverage type to apply the threshold to.").FromAmong("line", "branch", "method");
-      var thresholdStat = new Option<ThresholdStatistic>("--threshold-stat", () => ThresholdStatistic.Minimum, "Coverage statistic used to enforce the threshold value.") { Arity = ArgumentArity.ZeroOrMore };
+      var thresholdStat = new Option<ThresholdStatistic>("--threshold-stat", () => ThresholdStatistic.Minimum, "Coverage statistic used to enforce the threshold value.") { Arity = ArgumentArity.ZeroOrOne };
       var excludeFilters = new Option<string[]>("--exclude", "Filter expressions to exclude specific modules and types.") { Arity = ArgumentArity.ZeroOrMore, AllowMultipleArgumentsPerToken = true };
       var includeFilters = new Option<string[]>("--include", "Filter expressions to include only specific modules and types.") { Arity = ArgumentArity.ZeroOrMore, AllowMultipleArgumentsPerToken = true };
       var excludedSourceFiles = new Option<string[]>("--exclude-by-file", "Glob patterns specifying source files to exclude.") { Arity = ArgumentArity.ZeroOrMore, AllowMultipleArgumentsPerToken = true };