No backtrace to error

[normcf]

john@transition:$ dart --version
Dart VM version: 2.0.0-dev.58.0 (Unknown timestamp) on "linux_x64"
john@transition:$ lsb_release -d
Description: Ubuntu 18.04 LTS

webdev serve -v --log-requests web
No builders from me.
Testing with Chrome Version 67.0.3396.62 (Official Build) (64-bit)
Using Apache2 with reverse proxy. php is handled by Apache and everything else is passed to webdev.

Trying to debug and I get this in the console:

dart_sdk.js:4831 Uncaught _js_helper.TypeErrorImpl.new {message: "Type '(MouseEvent$) => void' is not a subtype of expected type '(Event$) => void'.", Symbol(_error): Error at Object.dart.throw (http://192.168.1.200/packages/$sdk/dev_compiler/amd/dart_sdk.js:4830…} dart.throw @ dart_sdk.js:4831 async._rethrow @ dart_sdk.js:29268 async._schedulePriorityAsyncCallback.dart.fn @ dart_sdk.js:29263 async._microtaskLoop @ dart_sdk.js:25905 async._startMicrotaskLoop @ dart_sdk.js:25911 internalCallback @ dart_sdk.js:25981 childList (async) dart.fn.callback @ dart_sdk.js:25991 _scheduleImmediate @ dart_sdk.js:25967 async._scheduleAsyncCallback @ dart_sdk.js:25925 async._rootScheduleMicrotask @ dart_sdk.js:29319 scheduleMicrotask @ dart_sdk.js:29509 [_asyncComplete] @ dart_sdk.js:25584 complete @ dart_sdk.js:25117 xhr.(anonymous function).listen.dart.fn.e @ dart_sdk.js:78069 dart._checkAndCall @ dart_sdk.js:4651 dart.dcall @ dart_sdk.js:4656 (anonymous function).html$._wrapZone.dart.fn.e @ dart_sdk.js:98872 load (async) [_addEventListener] @ dart_sdk.js:56878 [dartx.addEventListener] @ dart_sdk.js:56868 [_tryResume] @ dart_sdk.js:98853 _EventStreamSubscription.new @ dart_sdk.js:98873 listen @ dart_sdk.js:98674 request @ dart_sdk.js:78063 postFormData @ dart_sdk.js:78030 refreshTab @ not.dart:780 refresh @ not.dart:748 chosen @ supertabview.dart:70 tabClicked @ supertabview.dart:61 dart._checkAndCall @ dart_sdk.js:4651 dart.dcall @ dart_sdk.js:4656 (anonymous function).html$._wrapZone.dart.fn.e @ dart_sdk.js:98872

The code line at not.dart line 780 is

HttpRequest.postFormData(url, postArgs).then(onLogDataLoaded, onError: simpleHttpError);

but after old school debugging (print statements in the code) I know this is not the problem. The problem was in function onLogDataLoaded. In this function (a few functions deep)
void handleDoubleClick(MouseEvent e) {...}
was called. After finding this line, I could change it to
void handleDoubleClick(Event e) {...}
which fixed it. Note this has been running for a couple of years and gives no error in dart2js.

I could regen by putting the bug back if you need me to do anything.

[jakemac53]

duplicate of #1532 I think

[normcf]

did you mean to say it was a duplicate of itself?

[natebosch]

Should have been duplicate of #1525

See angulardart/angular#1367 (comment) for how to enable custom formatters and please update at #1525 if that doesn't help