Analyzer errors due to private constructor for freezed classes

[AngeloAvv]

Sample class:

@freezed
abstract class Project with _$Project {
  const Project._();

  const factory Project(
    int id, {
    String? name,
    required String projectId,
    required String clientId,
    required String privateKey,
    required String clientEmail,
    required DateTime createdAt,
    DateTime? updatedAt,
  }) = _Project;
}

Build output:

Deprecated. Use `dart run` instead.
Building package executable... (4.1s)
Built build_runner:build_runner.
[INFO] Generating build script completed, took 237ms
[INFO] Precompiling build script... completed, took 4.4s
[INFO] Building new asset graph completed, took 2.1s
[INFO] Checking for unexpected pre-existing outputs. completed, took 0ms
[INFO] Generating SDK summary completed, took 4.7s
[SEVERE] dart_mapper_generator on lib/models/project/project.dart:

RangeError (length): Invalid value: Valid value range is empty: 0
dart:core                                                                _Array.[]
package:analyzer/src/generated/element_walker.dart 206:19                ElementWalker.getParameter
package:analyzer/src/dart/resolver/resolution_visitor.dart 1211:35       ResolutionVisitor.visitSimpleFormalParameter
package:analyzer/src/dart/ast/ast.dart 15870:15                          SimpleFormalParameterImpl.accept
package:analyzer/src/dart/ast/ast.dart 12915:20                          NodeListImpl.accept
package:analyzer/src/dart/ast/ast.dart 7783:17                           FormalParameterListImpl.visitChildren
package:analyzer/dart/ast/visitor.dart 1166:10                           RecursiveAstVisitor.visitFormalParameterList
package:analyzer/src/dart/ast/ast.dart 7779:50                           FormalParameterListImpl.accept
package:analyzer/src/dart/resolver/resolution_visitor.dart 376:31        ResolutionVisitor.visitConstructorDeclaration.<fn>.<fn>.<fn>.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1889:8        ResolutionVisitor._withElementWalker
package:analyzer/src/dart/resolver/resolution_visitor.dart 373:11        ResolutionVisitor.visitConstructorDeclaration.<fn>.<fn>.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1900:8        ResolutionVisitor._withNameScope
package:analyzer/src/dart/resolver/resolution_visitor.dart 370:9         ResolutionVisitor.visitConstructorDeclaration.<fn>.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1889:8        ResolutionVisitor._withElementWalker
package:analyzer/src/dart/resolver/resolution_visitor.dart 369:7         ResolutionVisitor.visitConstructorDeclaration.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1878:8        ResolutionVisitor._withElementHolder
package:analyzer/src/dart/resolver/resolution_visitor.dart 368:5         ResolutionVisitor.visitConstructorDeclaration
package:analyzer/src/dart/ast/ast.dart 4303:15                           ConstructorDeclarationImpl.accept
package:analyzer/src/dart/ast/ast.dart 12915:20                          NodeListImpl.accept
package:analyzer/src/dart/resolver/resolution_visitor.dart 320:22        ResolutionVisitor.visitClassDeclaration.<fn>.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1900:8        ResolutionVisitor._withNameScope
package:analyzer/src/dart/resolver/resolution_visitor.dart 294:7         ResolutionVisitor.visitClassDeclaration.<fn>
package:analyzer/src/dart/resolver/resolution_visitor.dart 1889:8        ResolutionVisitor._withElementWalker
package:analyzer/src/dart/resolver/resolution_visitor.dart 293:5         ResolutionVisitor.visitClassDeclaration
package:analyzer/src/dart/ast/ast.dart 2908:50                           ClassDeclarationImpl.accept
package:analyzer/src/dart/ast/ast.dart 12915:20                          NodeListImpl.accept
package:analyzer/src/dart/ast/ast.dart 3572:21                           CompilationUnitImpl.visitChildren
package:analyzer/dart/ast/visitor.dart 956:10                            RecursiveAstVisitor.visitCompilationUnit
package:analyzer/src/dart/ast/ast.dart 3565:50                           CompilationUnitImpl.accept
package:analyzer/src/dart/analysis/library_analyzer.dart 836:10          LibraryAnalyzer._resolveFile
package:analyzer/src/dart/analysis/library_analyzer.dart 690:7           LibraryAnalyzer._parseAndResolve
package:analyzer/src/dart/analysis/library_analyzer.dart 123:7           LibraryAnalyzer.analyze.<fn>
package:analyzer/src/util/performance/operation_performance.dart 155:23  OperationPerformanceImpl.run
package:analyzer/src/dart/analysis/library_analyzer.dart 122:17          LibraryAnalyzer.analyze
package:analyzer/src/dart/analysis/driver.dart 1371:13                   AnalysisDriver._analyzeFileImpl.<fn>.<fn>
package:analyzer/src/util/performance/operation_performance.dart 155:23  OperationPerformanceImpl.run
package:analyzer/src/dart/analysis/driver.dart 1360:35                   AnalysisDriver._analyzeFileImpl.<fn>
package:analyzer/src/dart/analysis/performance_logger.dart 32:15         PerformanceLog.run
package:analyzer/src/dart/analysis/driver.dart 1308:20                   AnalysisDriver._analyzeFileImpl
package:analyzer/src/dart/analysis/driver.dart 1285:9                    AnalysisDriver._analyzeFile.<fn>
package:analyzer/src/util/performance/operation_performance.dart 155:23  OperationPerformanceImpl.run
package:analyzer/src/dart/analysis/driver.dart 1282:38                   AnalysisDriver._analyzeFile
package:analyzer/src/dart/analysis/driver.dart 1658:5                    AnalysisDriver._getErrors
package:analyzer/src/dart/analysis/driver.dart 1195:7                    AnalysisDriver.performWork
package:analyzer/src/dart/analysis/driver.dart 2373:24                   AnalysisDriverScheduler._run

[INFO] Running build completed, took 23.4s
[INFO] Caching finalized dependency graph completed, took 192ms
[SEVERE] Failed after 23.6s
Failed to update packages.

Generator works fine, but it makes CI pipelines to fail.