build Failed to precompile build_runner:build

Failed to precompile build_runner:build_runner: Crash when compiling package:build_config/src/builder_definition.dart, at character offset null: Bad state: No element #0 List.first (dart:core/runtime/libgrowable_array.dart:215:5) #1 BodyBuilder.finishFields (package:front_end/src/fasta/kernel/body_builder.dart:547:28) #2 DietListener.listenerFinishFields (package:front_end/src/fasta/source/diet_listener.dart:804:14) #3 DietListener.parseFields (package:front_end/src/fasta/source/diet_listener.dart:847:5) #4 DietListener.buildFields (package:front_end/src/fasta/source/diet_listener.dart:654:5) #5 DietListener.endFields (package:front_end/src/fasta/source/diet_listener.dart:284:5) #6 Parser.parseFields (package:front_end/src/fasta/parser/parser.dart:2251:16) #7 Parser.parseClassOrMixinMemberImpl (package:front_end/src/fasta/parser/parser.dart:2910:15) #8 Parser.parseClassOrMixinBody (package:front_end/src/fasta/parser/parser.dart:2700:15) #9 Parser.parseClass (package:front_end/src/fasta/parser/parser.dart:1710:13) #10 Parser.parseClassOrNamedMixinApplication (package:front_end/src/fasta/parser/parser.dart:1670:14) #11 Parser.parseTopLevelKeywordDeclaration (package:front_end/src/fasta/parser/parser.dart:565:14) #12 Parser.parseTopLevelDeclarationImpl (package:front_end/src/fasta/parser/parser.dart:457:14) #13 Parser.parseUnit (package:front_end/src/fasta/parser/parser.dart:336:15) #14 SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:253:14) #15 Loader.buildBodies (package:front_end/src/fasta/loader.dart:181:15) #16 KernelTarget.buildComponent. (package:front_end/src/fasta/kernel/kernel_target.dart:307:20) #17 withCrashReporting (package:front_end/src/fasta/crash.dart:122:24) #18 KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:305:12) #19 generateKernelInternal. (package:front_end/src/kernel_generator_impl.dart:145:38) #20 withCrashReporting (package:front_end/src/fasta/crash.dart:122:24) #21 generateKernelInternal (package:front_end/src/kernel_generator_impl.dart:55:10) #22 generateKernel. (package:front_end/src/kernel_generator_impl.dart:40:18) #23 CompilerContext.runWithOptions. (package:front_end/src/fasta/compiler_context.dart:132:20) #24 CompilerContext.runInContext.. (package:front_end/src/fasta/compiler_context.dart:120:46) #25 new Future.sync (dart:async/future.dart:224:31) #26 CompilerContext.runInContext. (package:front_end/src/fasta/compiler_context.dart:120:19) #27 _rootRun (dart:async/zone.dart:1124:13) #28 _CustomZone.run (dart:async/zone.dart:1021:19) #29 _runZoned (dart:async/zone.dart:1516:10) #30 runZoned (dart:async/zone.dart:1463:12) #31 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:119:12) #32 CompilerContext.runWithOptions (package:front_end/src/fasta/compiler_context.dart:130:10) #33 generateKernel (package:front_end/src/kernel_generator_impl.dart:39:32) #34 kernelForComponent (package:front_end/src/api_prototype/kernel_generator.dart:83:17) #35 SingleShotCompilerWrapper.compileInternal (file:///b/build/slave/Mac_Engine/build/src/third_party/dart/pkg/vm/bin/kernel_service.dart:179:11) #36 Compiler.compile. (file:///b/build/slave/Mac_Engine/build/src/third_party/dart/pkg/vm/bin/kernel_service.dart:121:31) #37 new Future. (dart:async/future.dart:176:37) #38 _rootRun (dart:async/zone.dart:1120:38) #39 _CustomZone.run (dart:async/zone.dart:1021:19) #40 _CustomZone.runGuarded (dart:async/zone.dart:923:7) #41 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:963:23) #42 _rootRun (dart:async/zone.dart:1124:13) #43 _CustomZone.run (dart:async/zone.dart:1021:19) #44 _CustomZone.bindCallback. (dart:async/zone.dart:947:23) #45 Timer._createTimer. (dart:async/runtime/libtimer_patch.dart:21:15) #46 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19) #47 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5) #48 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)