VM error: "Not in inclusive range 6457..286720: 1578263"

[kevmoo]

Happening all over

3.6.0-149.0.dev

RangeError (end): Invalid value: Not in inclusive range 6457..286720: 1578263
  dart:typed_data                                                          new Uint8List.sublistView
  package:analyzer/src/summary2/data_reader.dart 202:28                    SummaryDataReader.readUint8List
  package:analyzer/src/summary2/package_bundle_format.dart 85:31           new PackageBundleReader
  package:analyzer/src/clients/build_resolvers/build_resolvers.dart 45:[19](https://github.com/kevmoo/source_gen_test/actions/runs/10436304756/job/28901213357#step:5:20)  createAnalysisDriver
  package:build_resolvers/src/analysis_driver.dart 26:10                   analysisDriver
  package:build_resolvers/src/resolver.dart 460:26                         AnalyzerResolvers._ensureInitialized.<fn>
  ===== asynchronous gap ===========================
  package:async/src/result/value.dart 24:3                                 ValueResult.ValueResult
  ===== asynchronous gap ===========================
  package:async/src/result/result.dart 131:[22](https://github.com/kevmoo/source_gen_test/actions/runs/10436304756/job/28901213357#step:5:23)                              Result.release.<fn>
  ===== asynchronous gap ===========================
  package:build_resolvers/src/resolver.dart 470:5                          AnalyzerResolvers.get
  ===== asynchronous gap ===========================
  package:build/src/builder/build_step_impl.dart [23](https://github.com/kevmoo/source_gen_test/actions/runs/10436304756/job/28901213357#step:5:24)7:8                     _DelayedResolver.libraryFor
  ===== asynchronous gap ===========================
  package:build_test/src/resolve_source.dart 238:23                        _ResolveSourceBuilder.build
  ===== asynchronous gap ===========================
  package:build/src/generate/run_builder.dart 83:7                         runBuilder.buildForInput
  ===== asynchronous gap ===========================
  package:build/src/builder/logging.dart 32:40                             scopeLogAsync.<fn>

[kevmoo]

See https://github.com/kevmoo/source_gen_test/actions/runs/10436304756/job/28901213357

[dart-github-bot]

Summary: The user is encountering a RangeError in the Uint8List.sublistView method, indicating an attempt to access an element outside the valid range of the list. This error occurs in the package:analyzer library, specifically in the SummaryDataReader.readUint8List function.

[mraleph]

It is a bug in

build/build_resolvers/lib/src/sdk_summary.dart

Line 37 in ec64e84

Future<String> defaultSdkSummaryGenerator() async {

.

Note that the way this function is written is not guarding against multiple instances of this function running in parallel and all creating the same summary output. So it might end up reading from file which is being overwritten and as a result it will get partial summary.

[kevmoo]

CC @jakemac53 @natebosch re ☝️