{"action":"opened","issue":{"url":"https://api.github.com/repos/flutter/flutter/issues/15033","repository_url":"https://api.github.com/repos/flutter/flutter","labels_url":"https://api.github.com/repos/flutter/flutter/issues/15033/labels{/name}","comments_url":"https://api.github.com/repos/flutter/flutter/issues/15033/comments","events_url":"https://api.github.com/repos/flutter/flutter/issues/15033/events","html_url":"https://github.com/flutter/flutter/issues/15033","id":301561580,"number":15033,"title":"Fasta crashes on second time running a flutter app after performing a hot 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Steps to Reproduce\r\n\r\n`flutter run --preview-dart-2`\r\n\r\nMake any tiny tweak to widget_inspector.dart or any other file in package:flutter\r\n\r\nTrigger hot reload\r\n\r\nstop the app and rerun by issuing\r\n`flutter run --preview-dart-2`\r\n\r\nStartup fails with the following exception:\r\n\r\n```\r\nexamples/flutter_gallery$ flutter run --preview-dart-2\r\nLaunching lib/main.dart on Android SDK built for x86 in debug mode...\r\nInitializing gradle...                                       1.0s\r\nResolving dependencies...                                    0.9s\r\nRunning 'gradlew assembleDebug'...\r\ncompiler message: Unhandled exception:\r\npackage:flutter/widgets.dart: Internal problem: Unhandled Null in finalizeExports.\r\n#0      internalProblem (package:front_end/src/fasta/problems.dart:31)\r\n#1      unhandled (package:front_end/src/fasta/problems.dart:44)\r\n#2      DillLibraryBuilder.finalizeExports (package:front_end/src/fasta/dill/dill_library_builder.dart:185)\r\n#3      DillLoader.finalizeExports.<anonymous closure> (package:front_end/src/fasta/dill/dill_loader.dart:71)\r\n#4      _HashVMBase&MapMixin&&_LinkedHashMapMixin.forEach (dart:collection-patch/dart:collection/compact_hash.dart:361)\r\n#5      DillLoader.finalizeExports (package:front_end/src/fasta/dill/dill_loader.dart:69)\r\n#6      DillTarget.buildOutlines (package:front_end/src/fasta/dill/dill_target.dart:54)\r\n<asynchronous suspension>\r\n#7      IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:123)\r\n<asynchronous suspension>\r\n#8      CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:103)\r\n#9      _rootRun (dart:async/zone.dart:1126)\r\n#10     _CustomZone.run (dart:async/zone.dart:1023)\r\n#11     runZoned (dart:async/zone.dart:1501)\r\n#12     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:103)\r\n#13     IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:58)\r\n<asynchronous suspension>\r\n#14     IncrementalCompiler.compile (package:vm/incremental_compiler.dart:33)\r\n<asynchronous suspension>\r\n#15     _FrontendCompiler.compile.<anonymous closure> (package:frontend_server/server.dart:200)\r\n#16     new Future.<anonymous closure> (dart:async/future.dart:174)\r\n#17     _rootRun (dart:async/zone.dart:1122)\r\n#18     _CustomZone.run (dart:async/zone.dart:1023)\r\n#19     _CustomZone.runGuarded (dart:async/zone.dart:925)\r\n#20     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965)\r\n#21     _rootRun (dart:async/zone.dart:1126)\r\n#22     _CustomZone.run (dart:async/zone.dart:1023)\r\n#23     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949)\r\n#24     Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21)\r\n#25     _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:382)\r\n#26     _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:416)\r\n#27     _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)\r\n````\r\n"}}
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