Unable to add breakpoints in "part" files ("Unknown library" errors), "Aww, snap!" in Chrome if changed to imports

[DanTup]

Raised by @skateboarder with a repro at Dart-Code/Dart-Code#3194 (comment).

Everything works fine for non-web, but with web if the project uses part the breakpoints are not set (error below), and if I change from part to imports, then I get an "Awww, snap!" page in Chrome when starting the app.

The app is being run with --no-sound-null-safety, but since it works fine on iOS I don't think that's related.

[12:17:15] [VmService] [Info] [_brokenBreakpoints] ==> {"id":"11","jsonrpc":"2.0","method":"addBreakpointWithScriptUri","params":{"isolateId":"1","scriptUri":"file:///private/tmp/_brokenBreakpoints/lib/main.dart","line":38}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] ==> {"id":"12","jsonrpc":"2.0","method":"addBreakpointWithScriptUri","params":{"isolateId":"1","scriptUri":"file:///private/tmp/_brokenBreakpoints/lib/trying.dart","line":30}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] ==> {"id":"13","jsonrpc":"2.0","method":"addBreakpointWithScriptUri","params":{"isolateId":"1","scriptUri":"file:///private/tmp/_brokenBreakpoints/lib/trying.dart","line":38}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] ==> {"id":"14","jsonrpc":"2.0","method":"addBreakpointWithScriptUri","params":{"isolateId":"1","scriptUri":"file:///private/tmp/_brokenBreakpoints/lib/trying.dart","line":67}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] ==> {"id":"15","jsonrpc":"2.0","method":"addBreakpointWithScriptUri","params":{"isolateId":"1","scriptUri":"file:///private/tmp/_brokenBreakpoints/lib/trying.dart","line":76}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","id":"12","error":{"code":-32603,"message":"addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: \"file:///private/tmp/_brokenBreakpoints/lib/trying.dart\"","data":{"details":"#0      new DartUri._fromFileUri (package:dwds/src/utilities/dart_uri.dart:144:5)\n#1      new DartUri (package:dwds/src/utilities/dart_uri.dart:114:49)\n#2      ChromeProxyService.addBreakpointWithScriptUri (package:dwds/src/services/chrome_proxy_service.dart:304:19)\n#3      VmServerConnection._delegateRequest (package:vm_service/src/vm_service.dart:1260:51)\n#4      _rootRunUnary (dart:async/zone.dart:1362:47)\n#5      _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#6      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#7      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#8      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#9      _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#10     _MapStream._handleData (dart:async/stream_pipe.dart:218:10)\n#11     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#12     _rootRunUnary (dart:async/zone.dart:1362:47)\n#13     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#14     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#15     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#16     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#17     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#18     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#19     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#20     new WebSocketImpl.fromSocket.<anonymous closure> (package:web_socket_channel/src/copy/web_socket_impl.dart:728:21)\n#21     _rootRunUnary (dart:async/zone.dart:1362:47)\n#22     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#26     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#27     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#28     _WebSocketProtocolTransformer._messageFrameEnd (package:web_socket_channel/src/copy/web_socket_impl.dart:320:22)\n#29     _WebSocketProtocolTransformer.add (package:web_socket_channel/src/copy/web_socket_impl.dart:219:46)\n#30     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#31     _rootRunUnary (dart:async/zone.dart:1362:47)\n#32     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#33     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#34     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#35     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#36     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#37     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#38     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#39     _Socket._onData (dart:io-patch/socket_patch.dart:2144:41)\n#40     _rootRunUnary (dart:async/zone.dart:1370:13)\n#41     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#42     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#43     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#44     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#45     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#46     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#47     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#48     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1680:33)\n#49     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1192:14)\n#50     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)\n#51     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)\n#52     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)\n#53     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)\n"}}}
[12:17:15] [VmService] [Error] [_brokenBreakpoints] addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: "file:///private/tmp/_brokenBreakpoints/lib/trying.dart"
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","id":"13","error":{"code":-32603,"message":"addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: \"file:///private/tmp/_brokenBreakpoints/lib/trying.dart\"","data":{"details":"#0      new DartUri._fromFileUri (package:dwds/src/utilities/dart_uri.dart:144:5)\n#1      new DartUri (package:dwds/src/utilities/dart_uri.dart:114:49)\n#2      ChromeProxyService.addBreakpointWithScriptUri (package:dwds/src/services/chrome_proxy_service.dart:304:19)\n#3      VmServerConnection._delegateRequest (package:vm_service/src/vm_service.dart:1260:51)\n#4      _rootRunUnary (dart:async/zone.dart:1362:47)\n#5      _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#6      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#7      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#8      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#9      _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#10     _MapStream._handleData (dart:async/stream_pipe.dart:218:10)\n#11     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#12     _rootRunUnary (dart:async/zone.dart:1362:47)\n#13     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#14     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#15     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#16     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#17     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#18     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#19     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#20     new WebSocketImpl.fromSocket.<anonymous closure> (package:web_socket_channel/src/copy/web_socket_impl.dart:728:21)\n#21     _rootRunUnary (dart:async/zone.dart:1362:47)\n#22     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#26     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#27     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#28     _WebSocketProtocolTransformer._messageFrameEnd (package:web_socket_channel/src/copy/web_socket_impl.dart:320:22)\n#29     _WebSocketProtocolTransformer.add (package:web_socket_channel/src/copy/web_socket_impl.dart:219:46)\n#30     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#31     _rootRunUnary (dart:async/zone.dart:1362:47)\n#32     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#33     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#34     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#35     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#36     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#37     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#38     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#39     _Socket._onData (dart:io-patch/socket_patch.dart:2144:41)\n#40     _rootRunUnary (dart:async/zone.dart:1370:13)\n#41     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#42     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#43     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#44     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#45     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#46     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#47     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#48     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1680:33)\n#49     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1192:14)\n#50     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)\n#51     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)\n#52     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)\n#53     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)\n"}}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","id":"14","error":{"code":-32603,"message":"addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: \"file:///private/tmp/_brokenBreakpoints/lib/trying.dart\"","data":{"details":"#0      new DartUri._fromFileUri (package:dwds/src/utilities/dart_uri.dart:144:5)\n#1      new DartUri (package:dwds/src/utilities/dart_uri.dart:114:49)\n#2      ChromeProxyService.addBreakpointWithScriptUri (package:dwds/src/services/chrome_proxy_service.dart:304:19)\n#3      VmServerConnection._delegateRequest (package:vm_service/src/vm_service.dart:1260:51)\n#4      _rootRunUnary (dart:async/zone.dart:1362:47)\n#5      _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#6      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#7      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#8      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#9      _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#10     _MapStream._handleData (dart:async/stream_pipe.dart:218:10)\n#11     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#12     _rootRunUnary (dart:async/zone.dart:1362:47)\n#13     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#14     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#15     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#16     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#17     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#18     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#19     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#20     new WebSocketImpl.fromSocket.<anonymous closure> (package:web_socket_channel/src/copy/web_socket_impl.dart:728:21)\n#21     _rootRunUnary (dart:async/zone.dart:1362:47)\n#22     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#26     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#27     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#28     _WebSocketProtocolTransformer._messageFrameEnd (package:web_socket_channel/src/copy/web_socket_impl.dart:320:22)\n#29     _WebSocketProtocolTransformer.add (package:web_socket_channel/src/copy/web_socket_impl.dart:219:46)\n#30     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#31     _rootRunUnary (dart:async/zone.dart:1362:47)\n#32     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#33     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#34     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#35     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#36     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#37     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#38     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#39     _Socket._onData (dart:io-patch/socket_patch.dart:2144:41)\n#40     _rootRunUnary (dart:async/zone.dart:1370:13)\n#41     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#42     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#43     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#44     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#45     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#46     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#47     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#48     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1680:33)\n#49     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1192:14)\n#50     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)\n#51     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)\n#52     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)\n#53     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)\n"}}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","id":"15","error":{"code":-32603,"message":"addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: \"file:///private/tmp/_brokenBreakpoints/lib/trying.dart\"","data":{"details":"#0      new DartUri._fromFileUri (package:dwds/src/utilities/dart_uri.dart:144:5)\n#1      new DartUri (package:dwds/src/utilities/dart_uri.dart:114:49)\n#2      ChromeProxyService.addBreakpointWithScriptUri (package:dwds/src/services/chrome_proxy_service.dart:304:19)\n#3      VmServerConnection._delegateRequest (package:vm_service/src/vm_service.dart:1260:51)\n#4      _rootRunUnary (dart:async/zone.dart:1362:47)\n#5      _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#6      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#7      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#8      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#9      _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#10     _MapStream._handleData (dart:async/stream_pipe.dart:218:10)\n#11     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#12     _rootRunUnary (dart:async/zone.dart:1362:47)\n#13     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#14     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#15     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#16     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#17     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#18     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#19     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#20     new WebSocketImpl.fromSocket.<anonymous closure> (package:web_socket_channel/src/copy/web_socket_impl.dart:728:21)\n#21     _rootRunUnary (dart:async/zone.dart:1362:47)\n#22     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#26     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#27     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#28     _WebSocketProtocolTransformer._messageFrameEnd (package:web_socket_channel/src/copy/web_socket_impl.dart:320:22)\n#29     _WebSocketProtocolTransformer.add (package:web_socket_channel/src/copy/web_socket_impl.dart:219:46)\n#30     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#31     _rootRunUnary (dart:async/zone.dart:1362:47)\n#32     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#33     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#34     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#35     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#36     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#37     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#38     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#39     _Socket._onData (dart:io-patch/socket_patch.dart:2144:41)\n#40     _rootRunUnary (dart:async/zone.dart:1370:13)\n#41     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#42     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#43     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#44     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#45     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#46     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#47     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#48     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1680:33)\n#49     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1192:14)\n#50     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)\n#51     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)\n#52     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)\n#53     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)\n"}}}
[12:17:15] [VmService] [Error] [_brokenBreakpoints] addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: "file:///private/tmp/_brokenBreakpoints/lib/trying.dart"
[12:17:15] [VmService] [Error] [_brokenBreakpoints] addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: "file:///private/tmp/_brokenBreakpoints/lib/trying.dart"
[12:17:15] [VmService] [Error] [_brokenBreakpoints] addBreakpointWithScriptUri: Invalid argument (uri): Unknown library: "file:///private/tmp/_brokenBreakpoints/lib/trying.dart"
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","id":"11","result":{"type":"Breakpoint","id":"bp/3#38","breakpointNumber":852,"resolved":true,"location":{"type":"SourceLocation","script":{"type":"@Script","id":"3","uri":"package:foo/main.dart"},"tokenPos":1355}}}
[12:17:15] [VmService] [Info] [_brokenBreakpoints] <== {"jsonrpc":"2.0","method":"streamNotify","params":{"streamId":"Debug","event":{"type":"Event","kind":"BreakpointAdded","timestamp":1615551435192,"isolate":{"type":"@Isolate","id":"1","number":"1","name":"main()","isSystemIsolate":fa

I reproduced on current Flutter master.

[grouma]

@sigmundch this vaguely reminds me of an issue you resolved a few months ago. Do you remember the details?

[annagrin]

I'll take a look at this

[sigmundch]

Sorry for the slow reply on my end - I honestly can't remember. It have this vague recollection that we used to include the library URIs without the part URIs before we had metadata files. However, if I recall correctly, @annagrin's metadata tracked part URIs pretty early on.

[grouma]

The issue I was referring to was b/171406503. The root cause was this issue. It may not be related since the problem was caused by custom formatters but it's the only other issue I've seen where the Chrome DevTools would fully display an "Aw Snap" error.

[annagrin]

I found the issue - we are not registering module names for part uris, so looking up locations fails. Will fix and add tests.