dart2js crash on List<void foo()> l;

[pemdas]

Versions involved:

Justins-MBP:~ justin$ dart2js --version
Dart-to-JavaScript compiler (dart2js) version: 1.13.2

Justins-MBP:~ justin$ uname -a
Darwin Justins-MacBook-Pro.local 14.5.0 Darwin Kernel Version 14.5.0: Wed Jul 29 02:26:53 PDT 2015; root:xnu-2782.40.9~1/RELEASE_X86_64 x86_64

This code compiles:

typedef void foo();
List<foo> l;

This code has a rather different result:

List<void foo()> l;

Justins-MBP:~ justin$ dart2js foo.dart
foo.dart:1:5:
Error: Can't find '>' to match '<'.
List<void foo()> l;
    ^
foo.dart:
Internal Error: The compiler crashed when compiling this element.

The compiler is broken.

When compiling the above element, the compiler crashed. It is not
possible to tell if this is caused by a problem in your program or
not. Regardless, the compiler should not crash.

The Dart team would greatly appreciate if you would take a moment to
report this problem at http://dartbug.com/new.

Please include the following information:

• the name and version of your operating system,
• the Dart SDK build number (1.13.2), and
• the entire message you see here (including the full stack trace
  below as well as the source location above).

The compiler crashed: The null object does not have a getter 'next'.

NoSuchMethodError: method not found: 'next'
Receiver: null
Arguments: []
#0 Object._noSuchMethod (dart:core-patch/object_patch.dart:42)
#1 Object.noSuchMethod (dart:core-patch/object_patch.dart:45)
#2 Parser.findMemberName (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/parser.dart:1054)
#3 Parser.parseTopLevelMember (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/parser.dart:740)
#4 Parser.parseTopLevelDeclaration (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/parser.dart:138)
#5 Parser.parseUnit (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/parser.dart:111)
#6 DietParserTask.dietParse. (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/diet_parser_task.dart:35)
#7 CompilerTask.measure (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:55)
#8 DietParserTask.dietParse (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/parser/diet_parser_task.dart:29)
#9 ScannerTask.scanElements (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/scanner/scanner_task.dart:53)
#10 ScannerTask.scan. (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/scanner/scanner_task.dart:42)
#11 CompilerTask.measure (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:55)
#12 ScannerTask.scan (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/scanner/scanner_task.dart:41)
#13 ScannerTask.scanLibrary (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/scanner/scanner_task.dart:37)
#14 _LibraryLoaderTask.createLibrarySync. (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:635)
#15 _CompilerDiagnosticReporter.withCurrentElement (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:1691)
#16 _LibraryLoaderTask.createLibrarySync (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:629)
#17 _LibraryLoaderTask.createLibrary.. (file:///b/build/slave/dart-sdk-mac-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:613)
#18 _RootZone.runUnary (dart:async/zone.dart:1149)
#19 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:502)
#20 _Future._propagateToListeners (dart:async/future_impl.dart:585)
#21 _Future._completeWithValue (dart:async/future_impl.dart:376)
#22 _Future._asyncComplete. (dart:async/future_impl.dart:430)
#23 _microtaskLoop (dart:async/schedule_microtask.dart:43)
#24 _microtaskLoopEntry (dart:async/schedule_microtask.dart:52)
#25 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)
#26 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:151)

I haven't been able to find a reference that tells me definitively whether the non-typedef'd version should compile (seems like it should?), but even if this is a syntax error, it shouldn't crash the compiler.

[pemdas]

Ugh, angle brackets got eaten by some html sanitizer, apparently. Let me try again with manual escaping:

The broken code snippet is

List<void foo()> l;

[lrhn]

The code is invalid, but it shouldn't cause the compiler to crash.

[zoechi]

@pemdas wrap code blocks in triple ` (backtick)

[sigmundch]

(this is now handled by the CFE)