Bad state: No element when running pub run build_runner build

[tmatrai]

[](flutter pub run build_runner build --delete-conflicting-outputs
[INFO] Generating build script...
[INFO] Generating build script completed, took 454ms

[INFO] Precompiling build script......
[INFO] Precompiling build script... completed, took 5.7s

You have hit a bug in build_runner
Please file an issue with reproduction steps at https://github.com/dart-lang/build/issues

Bad state: No element
dart:core Iterable.first
package:swagger_dart_code_generator/swagger_dart_code_generator.dart 36:20 _generateExtensions
package:swagger_dart_code_generator/swagger_dart_code_generator.dart 50:32 SwaggerDartCodeGenerator.buildExtensions
package:build_runner_core/src/package_graph/apply_builders.dart 399:33 _validateBuilder
package:build_runner_core/src/package_graph/apply_builders.dart 181:9 new BuilderApplication.forBuilder..
package:build_runner_core/src/package_graph/apply_builders.dart 342:27 _createBuildPhasesForBuilderInCycle..
dart:core Iterable.toList
package:build_runner_core/src/package_graph/apply_builders.dart 289:8 createBuildPhases
package:build_runner_core/src/generate/build_impl.dart 110:29 BuildImpl.create
package:build_runner_core/src/generate/build_runner.dart 34:42 BuildRunner.create
package:build_runner/src/generate/build.dart 109:35 build
package:build_runner/src/entrypoint/build.dart 35:18 BuildCommand._run
package:args/command_runner.dart 209:13 CommandRunner.runCommand
package:build_runner/src/entrypoint/run.dart 26:18 run
.dart_tool/build/entrypoint/build.dart 31:16 main

pub finished with exit code 1)

[tmatrai]

Detailed info by running -v option

flutter pub run build_runner build --delete-conflicting-outputs -v
[ +79 ms] executing: sysctl hw.optional.arm64
[ +14 ms] Exit code 1 from: sysctl hw.optional.arm64
[ ] sysctl: unknown oid 'hw.optional.arm64'
[ +5 ms] executing: [/Users/mt/developer/flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +14 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[ ] f4abaa0735eba4dfd8f33f73363911d63931fe03
[ ] executing: [/Users/mt/developer/flutter/] git tag --points-at f4abaa0735eba4dfd8f33f73363911d63931fe03
[ +24 ms] Exit code 0 from: git tag --points-at f4abaa0735eba4dfd8f33f73363911d63931fe03
[ ] 2.2.3
[ +6 ms] executing: [/Users/mt/developer/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[ +14 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[ ] origin/stable
[ ] executing: [/Users/mt/developer/flutter/] git ls-remote --get-url origin
[ +13 ms] Exit code 0 from: git ls-remote --get-url origin
[ ] https://github.com/flutter/flutter.git
[ +105 ms] executing: [/Users/mt/developer/flutter/] git rev-parse --abbrev-ref HEAD
[ +17 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[ ] stable
[ +5 ms] executing: sw_vers -productName
[ +12 ms] Exit code 0 from: sw_vers -productName
[ ] macOS
[ ] executing: sw_vers -productVersion
[ +13 ms] Exit code 0 from: sw_vers -productVersion
[ ] 11.5.1
[ ] executing: sw_vers -buildVersion
[ +13 ms] Exit code 0 from: sw_vers -buildVersion
[ ] 20G80
[ +63 ms] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[ +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +38 ms] Artifact Instance of 'MaterialFonts' is not required, skipping update.
[ ] Artifact Instance of 'GradleWrapper' is not required, skipping update.
[ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[ ] Artifact Instance of 'FlutterSdk' is not required, skipping update.
[ ] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FontSubsetArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'PubDependencies' is not required, skipping update.
[ +31 ms] Using /Users/mt/developer/flutter/.pub-cache for the pub cache.
[ ] executing: /Users/mt/developer/flutter/bin/cache/dart-sdk/bin/pub run build_runner build --delete-conflicting-outputs -v
[INFO] Entrypoint:Generating build script...
[INFO] Entrypoint:Generating build script completed, took 403ms

[WARNING] Bootstrap:
Invalidated precompiled build script due to missing asset graph.
[INFO] Bootstrap:Precompiling build script......
[INFO] Bootstrap:Precompiling build script... completed, took 722ms

You have hit a bug in build_runner
Please file an issue with reproduction steps at https://github.com/dart-lang/build/issues

Bad state: No element
dart:core Iterable.first
package:swagger_dart_code_generator/swagger_dart_code_generator.dart 36:20 _generateExtensions
package:swagger_dart_code_generator/swagger_dart_code_generator.dart 50:32 SwaggerDartCodeGenerator.buildExtensions
package:build_runner_core/src/package_graph/apply_builders.dart 399:33 _validateBuilder
package:build_runner_core/src/package_graph/apply_builders.dart 181:9 new BuilderApplication.forBuilder..
package:build_runner_core/src/package_graph/apply_builders.dart 342:27 _createBuildPhasesForBuilderInCycle..
dart:core Iterable.toList
package:build_runner_core/src/package_graph/apply_builders.dart 289:8 createBuildPhases
package:build_runner_core/src/generate/build_impl.dart 110:29 BuildImpl.create
package:build_runner_core/src/generate/build_runner.dart 34:42 BuildRunner.create
package:build_runner/src/generate/build.dart 109:35 build
package:build_runner/src/entrypoint/build.dart 35:18 BuildCommand._run
package:args/command_runner.dart 209:13 CommandRunner.runCommand
package:build_runner/src/entrypoint/run.dart 26:18 run
.dart_tool/build/entrypoint/build.dart 31:16 main

[+2313 ms] "flutter run" took 2 411ms.
[ +6 ms] pub finished with exit code 1
[ +1 ms]
#0 throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
#1 _DefaultPub.interactively (package:flutter_tools/src/dart/pub.dart:368:7)

#2 PackagesForwardCommand.runCommand (package:flutter_tools/src/commands/packages.dart:241:5)

#3 FlutterCommand.run. (package:flutter_tools/src/runner/flutter_command.dart:1043:27)

#4 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)

#5 CommandRunner.runCommand (package:args/command_runner.dart:196:13)

#6 FlutterCommandRunner.runCommand. (package:flutter_tools/src/runner/flutter_command_runner.dart:284:9)

#7 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)

#8 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:232:5)

#9 run.. (package:flutter_tools/runner.dart:62:9)

#10 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)

#11 main (package:flutter_tools/executable.dart:91:3)

[ +149 ms] ensureAnalyticsSent: 147ms
[ +1 ms] Running shutdown hooks
[ ] Shutdown hooks complete
[ ] exiting with code 1

[jakemac53]

This looks like an issue with the swagger_dart_code_generator package, please file an issue at https://github.com/epam-cross-platform-lab/swagger-dart-code-generator/issues/new.