Failures on [cfe] Create SourceFieldBuilder through fragments

[johnniwinther]

There are new test failures on [cfe] Create SourceFieldBuilder through fragments.

The tests

co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t07 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t08 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t09 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t13 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t14 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t15 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t16 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t17 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t18 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t19 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t20 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t21 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t22 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t23 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t24 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t32 CompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t32 CompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmented_expression_A03_t32 CompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmenting_enum_values_A01_t02 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmenting_getters_setters_with_variable_A01_t03 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmenting_members_A03_t01 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmenting_members_A07_t01 MissingCompileTimeError (expected Pass)
co19/LanguageFeatures/Augmentation-libraries/augmenting_variables_A05_t03 MissingCompileTimeError (expected Pass)

are failing on configurations

cfe-strong-linux
cfe-weak-linux
dart2js-hostasserts-linux-chrome-unsound
dart2js-hostasserts-linux-d8
dart2js-linux-chrome
dart2wasm-asserts-linux-chrome
dart2wasm-linux-chrome
dart2wasm-linux-d8
dart2wasm-linux-jscm-chrome
ddc-linux-chrome
vm-aot-linux-release-x64
vm-mac-debug-arm64
vm-win-release-x64