Compiler crash when using collection-if pattern.

[mmcdon20]

At the request of @asashour, posting this as a separate issue.

Compiler crash when using collection-if pattern.

Using Dart SDK version: 3.0.0-229.0.dev (dev) (Fri Feb 10 20:38:38 2023 -0800) on "windows_x64".

compiled with dart --enable-experiment=records,patterns bin/example.dart

void main() {
  print(example([[1], [2], [3]], 2));
}

List<int> example(List<List<int>> lists, int n) => 
    [for (var list in lists) if (list case [var v] when v == n) v];

Crash when compiling file:///C:/Users/mmcdo/Documents/projects/project/bin/example.dart at character offset 
105:
type 'Scope' is not a subtype of type 'Token' in type cast

#0      BodyBuilder.endIfControlFlow (package:front_end/src/fasta/kernel/body_builder.dart:6514:27)
#1      IfComplete.parse (package:_fe_analyzer_shared/src/parser/literal_entry_info_impl.dart:212:23)
#2      Nested.parse (package:_fe_analyzer_shared/src/parser/literal_entry_info_impl.dart:303:58)
#3      Parser.parseLiteralListSuffix (package:_fe_analyzer_shared/src/parser/parser_impl.dart:6577:24)
#4      Parser.parsePrimary (package:_fe_analyzer_shared/src/parser/parser_impl.dart:6301:14)
#5      Parser.parseUnaryExpression (package:_fe_analyzer_shared/src/parser/parser_impl.dart:6116:12)
#6      Parser.parsePrecedenceExpression (package:_fe_analyzer_shared/src/parser/parser_impl.dart:5627:13)
#7      Parser.parseExpression (package:_fe_analyzer_shared/src/parser/parser_impl.dart:5567:15)
#8      Parser.parseExpressionFunctionBody (package:_fe_analyzer_shared/src/parser/parser_impl.dart:5240:13)
#9      Parser.parseFunctionBody (package:_fe_analyzer_shared/src/parser/parser_impl.dart:5167:14)
#10     DietListener.buildFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:1120:14)
#11     DietListener.endTopLevelMethod (package:front_end/src/fasta/source/diet_listener.dart:376:5)
#12     Parser.parseTopLevelMethod (package:_fe_analyzer_shared/src/parser/parser_impl.dart:3682:14)
#13     Parser.parseTopLevelMemberImpl (package:_fe_analyzer_shared/src/parser/parser_impl.dart:3424:14)
#14     Parser.parseTopLevelDeclarationImpl (package:_fe_analyzer_shared/src/parser/parser_impl.dart:606:14)
#15     Parser.parseUnit (package:_fe_analyzer_shared/src/parser/parser_impl.dart:403:15)
#16     SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:1267:12)
<asynchronous suspension>
#17     SourceLoader.buildBodies (package:front_end/src/fasta/source/source_loader.dart:676:7)
<asynchronous suspension>
#18     KernelTarget.buildComponent.<anonymous closure> (package:front_end/src/fasta/kernel/kernel_target.dart:611:7)
<asynchronous suspension>
#19     withCrashReporting (package:front_end/src/fasta/crash.dart:136:12)
<asynchronous suspension>
#20     _buildInternal (package:front_end/src/kernel_generator_impl.dart:206:19)
<asynchronous suspension>
#21     withCrashReporting (package:front_end/src/fasta/crash.dart:136:12)
<asynchronous suspension>
#22     generateKernel.<anonymous closure> (package:front_end/src/kernel_generator_impl.dart:48:12)
<asynchronous suspension>
#23     generateKernel (package:front_end/src/kernel_generator_impl.dart:47:10)
<asynchronous suspension>
#24     kernelForModule (package:front_end/src/api_prototype/kernel_generator.dart:100:11)
<asynchronous suspension>
#25     SingleShotCompilerWrapper.compileInternal (file:///C:/b/s/w/ir/x/w/sdk/pkg/vm/bin/kernel_service.dart:407:11)
<asynchronous suspension>
#26     Compiler.compile.<anonymous closure> (file:///C:/b/s/w/ir/x/w/sdk/pkg/vm/bin/kernel_service.dart:215:45)
<asynchronous suspension>
#27     _processLoadRequest (file:///C:/b/s/w/ir/x/w/sdk/pkg/vm/bin/kernel_service.dart:889:37)
<asynchronous suspension>

Originally posted by @mmcdon20 in #51376 (comment)

[asashour]

Seems to be a duplicate of #51327

[mmcdon20]

@asashour It appears to be the same error message, so I will close this issue.

[mmcdon20]

No longer seeing this error on latest version.