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[flutter_tools] Gracefully handle EROFS and write-protected file system errors - #192431
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…em errors When `flutter assemble` or other Flutter tool commands attempt to create build directories or write files to a read-only file system (such as Xcode build sandboxes or read-only volume mounts), the tool previously threw an unhandled `FileSystemException` instead of exiting cleanly. Handle POSIX errno 30 (`EROFS`) in `_handlePosixException` and Windows `ERROR_WRITE_PROTECT` (19) and `ERROR_PRIVILEGE_NOT_HELD` (1314) in `_handleWindowsException` in `packages/flutter_tools/lib/src/base/error_handling_io.dart`, translating them into actionable `ToolExit` messages. Fixes flutter#83053
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This pull request adds handling for read-only file system errors (erofs) on POSIX platforms, as well as write-protect and privilege-not-held errors on Windows, mapping them to permission-related error messages and adding corresponding tests. The reviewer recommends handling erofs separately to avoid suggesting 'sudo chown', which is misleading on a read-only file system, and provides suggestions to update the error message and the associated test expectations.
Separate `erofs` handling in `_handlePosixException` to provide an accurate message that the file system is read-only without suggesting running `sudo chown`, which fails on read-only file systems.
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flutter/flutter@b444e78...63b9518 2026-09-09 [email protected] Roll Packages from 9af9c60 to 36e088a (24 revisions) (flutter/flutter#192485) 2026-09-09 [email protected] Re-add Xcode and OpenJDK dependencies to macOS wasm local_engine builders (flutter/flutter#192238) 2026-09-09 [email protected] Roll Dart SDK from 77094991d1c1 to 4be1b711b4ba (5 revisions) (flutter/flutter#192453) 2026-09-09 [email protected] [material] Use super parameters in more places (flutter/flutter#192149) 2026-09-09 [email protected] [cupertino] Use super parameters in more places (flutter/flutter#192148) 2026-09-09 [email protected] [flutter_tools] Gracefully handle EROFS and write-protected file system errors (flutter/flutter#192431) 2026-09-09 [email protected] [tool] Migrate BuildIOSCommand and BuildIOSArchiveCommand to modular dependency injection (flutter/flutter#192250) 2026-09-09 [email protected] Replace more enum instances comparison to use `equality ==` instead of `identical` and update related tests (flutter/flutter#192229) 2026-09-09 [email protected] [web] Support local screenshot and golden testing in felt test (flutter/flutter#191318) 2026-09-09 [email protected] [tool] Migrate DaemonCommand and DebugAdapterCommand to modular dependency injection (flutter/flutter#190793) 2026-09-09 [email protected] [web] Support local golden testing in flutter test (flutter/flutter#191386) 2026-09-09 [email protected] [flutter_tools] Ignore widget previews outside lib/ during LSP code generation (flutter/flutter#192326) 2026-09-09 [email protected] [flutter_tools] Read package_config.json asynchronously in loadPackageConfigWithLogging (flutter/flutter#192443) 2026-09-08 [email protected] Add precacheTestImage to flutter_test and unskip web image tests (flutter/flutter#191435) 2026-09-08 [email protected] et: Fix compile_commands.json post-processing (flutter/flutter#192395) 2026-09-08 [email protected] Refactor createDebuggingOptions and option registrations to OptionDescriptor (flutter/flutter#192307) 2026-09-08 [email protected] [flutter_tools] Fix test separation between `VersionFreshnessValidator` and `FlutterVersion.checkFlutterVersionFreshness` (flutter/flutter#191593) 2026-09-08 [email protected] [tool] Migrate EmulatorsCommand to modular dependency injection (flutter/flutter#190769) 2026-09-08 [email protected] [tool] Migrate Desktop build subcommands and toolchain to modular dependency injection (flutter/flutter#190781) 2026-09-08 [email protected] [tool] Migrate Tooling and Analysis commands to modular dependency injection (flutter/flutter#190788) 2026-09-08 [email protected] Skip KGP version validation for AGP built-in Kotlin (flutter/flutter#192206) If this roll has caused a breakage, revert this CL and set the roller to dry run mode using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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…r#12814) flutter/flutter@b444e78...63b9518 2026-09-09 [email protected] Roll Packages from 9af9c60 to 36e088a (24 revisions) (flutter/flutter#192485) 2026-09-09 [email protected] Re-add Xcode and OpenJDK dependencies to macOS wasm local_engine builders (flutter/flutter#192238) 2026-09-09 [email protected] Roll Dart SDK from 77094991d1c1 to 4be1b711b4ba (5 revisions) (flutter/flutter#192453) 2026-09-09 [email protected] [material] Use super parameters in more places (flutter/flutter#192149) 2026-09-09 [email protected] [cupertino] Use super parameters in more places (flutter/flutter#192148) 2026-09-09 [email protected] [flutter_tools] Gracefully handle EROFS and write-protected file system errors (flutter/flutter#192431) 2026-09-09 [email protected] [tool] Migrate BuildIOSCommand and BuildIOSArchiveCommand to modular dependency injection (flutter/flutter#192250) 2026-09-09 [email protected] Replace more enum instances comparison to use `equality ==` instead of `identical` and update related tests (flutter/flutter#192229) 2026-09-09 [email protected] [web] Support local screenshot and golden testing in felt test (flutter/flutter#191318) 2026-09-09 [email protected] [tool] Migrate DaemonCommand and DebugAdapterCommand to modular dependency injection (flutter/flutter#190793) 2026-09-09 [email protected] [web] Support local golden testing in flutter test (flutter/flutter#191386) 2026-09-09 [email protected] [flutter_tools] Ignore widget previews outside lib/ during LSP code generation (flutter/flutter#192326) 2026-09-09 [email protected] [flutter_tools] Read package_config.json asynchronously in loadPackageConfigWithLogging (flutter/flutter#192443) 2026-09-08 [email protected] Add precacheTestImage to flutter_test and unskip web image tests (flutter/flutter#191435) 2026-09-08 [email protected] et: Fix compile_commands.json post-processing (flutter/flutter#192395) 2026-09-08 [email protected] Refactor createDebuggingOptions and option registrations to OptionDescriptor (flutter/flutter#192307) 2026-09-08 [email protected] [flutter_tools] Fix test separation between `VersionFreshnessValidator` and `FlutterVersion.checkFlutterVersionFreshness` (flutter/flutter#191593) 2026-09-08 [email protected] [tool] Migrate EmulatorsCommand to modular dependency injection (flutter/flutter#190769) 2026-09-08 [email protected] [tool] Migrate Desktop build subcommands and toolchain to modular dependency injection (flutter/flutter#190781) 2026-09-08 [email protected] [tool] Migrate Tooling and Analysis commands to modular dependency injection (flutter/flutter#190788) 2026-09-08 [email protected] Skip KGP version validation for AGP built-in Kotlin (flutter/flutter#192206) If this roll has caused a breakage, revert this CL and set the roller to dry run mode using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
victorsanni
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…r#12814) flutter/flutter@b444e78...63b9518 2026-09-09 [email protected] Roll Packages from 9af9c60 to 36e088a (24 revisions) (flutter/flutter#192485) 2026-09-09 [email protected] Re-add Xcode and OpenJDK dependencies to macOS wasm local_engine builders (flutter/flutter#192238) 2026-09-09 [email protected] Roll Dart SDK from 77094991d1c1 to 4be1b711b4ba (5 revisions) (flutter/flutter#192453) 2026-09-09 [email protected] [material] Use super parameters in more places (flutter/flutter#192149) 2026-09-09 [email protected] [cupertino] Use super parameters in more places (flutter/flutter#192148) 2026-09-09 [email protected] [flutter_tools] Gracefully handle EROFS and write-protected file system errors (flutter/flutter#192431) 2026-09-09 [email protected] [tool] Migrate BuildIOSCommand and BuildIOSArchiveCommand to modular dependency injection (flutter/flutter#192250) 2026-09-09 [email protected] Replace more enum instances comparison to use `equality ==` instead of `identical` and update related tests (flutter/flutter#192229) 2026-09-09 [email protected] [web] Support local screenshot and golden testing in felt test (flutter/flutter#191318) 2026-09-09 [email protected] [tool] Migrate DaemonCommand and DebugAdapterCommand to modular dependency injection (flutter/flutter#190793) 2026-09-09 [email protected] [web] Support local golden testing in flutter test (flutter/flutter#191386) 2026-09-09 [email protected] [flutter_tools] Ignore widget previews outside lib/ during LSP code generation (flutter/flutter#192326) 2026-09-09 [email protected] [flutter_tools] Read package_config.json asynchronously in loadPackageConfigWithLogging (flutter/flutter#192443) 2026-09-08 [email protected] Add precacheTestImage to flutter_test and unskip web image tests (flutter/flutter#191435) 2026-09-08 [email protected] et: Fix compile_commands.json post-processing (flutter/flutter#192395) 2026-09-08 [email protected] Refactor createDebuggingOptions and option registrations to OptionDescriptor (flutter/flutter#192307) 2026-09-08 [email protected] [flutter_tools] Fix test separation between `VersionFreshnessValidator` and `FlutterVersion.checkFlutterVersionFreshness` (flutter/flutter#191593) 2026-09-08 [email protected] [tool] Migrate EmulatorsCommand to modular dependency injection (flutter/flutter#190769) 2026-09-08 [email protected] [tool] Migrate Desktop build subcommands and toolchain to modular dependency injection (flutter/flutter#190781) 2026-09-08 [email protected] [tool] Migrate Tooling and Analysis commands to modular dependency injection (flutter/flutter#190788) 2026-09-08 [email protected] Skip KGP version validation for AGP built-in Kotlin (flutter/flutter#192206) If this roll has caused a breakage, revert this CL and set the roller to dry run mode using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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When
flutter assembleor other Flutter tool commands attempt to create build directories or write files to a read-only file system (such as Xcode build sandboxes or read-only volume mounts), the tool previously threw an unhandledFileSystemExceptioninstead of exiting cleanly with an actionable message.This change:
EROFS, Read-only file system) in_handlePosixExceptioninpackages/flutter_tools/lib/src/base/error_handling_io.dart.ERROR_WRITE_PROTECT(19) andERROR_PRIVILEGE_NOT_HELD(1314) in_handleWindowsException.ToolExitmessages instructing users to verify read/write permissions for the project and SDK.packages/flutter_tools/test/general.shard/base/error_handling_io_test.dart.Fixes #83053
Pre-launch Checklist
///).