Native extensions not loading under Windows with Dart 2

[rastertail]

Windows environment: Windows 10 x64 with Dart 2.0.0-dev.64.0, 2.0.0-dev.63.0 with --preview-dart-2, and 1.24.3
Linux environment: Arch Linux x64 with Dart 2.0.0-dev.63.0 with --preview-dart-2

Under Windows, using the sample extension included in the SDK (built with Visual Studio 2017 15.6.4), running sample_synchronous_extension.dart fails with the message Native extension path must be absolute.error: library handler failed. The extension works properly using Dart 1, and this issue also occurs with an extension I have written myself. Testing under Linux, everything works properly, even with Dart 2.

[anders-sandholm]

labelled area-vm for lack of a better label for native extensions

[tejainece]

Any updates on this one?

[DanTup]

Are there any workarounds for this? I just hit the same thing, and I also can't find any way to put an absolute path in there (dart-ext:file:/// seems wonky, and also doesn't seem to work).

[mraleph]

@sjindel-google you mentioned that you are going to rework the implementation so I am moving this to you.

[DanTup]

@sjindel-google Just tested the sample extension on Windows with 2.1.0-dev.1.0 and it works fine now (on v2.0 it gives the error in the OP here). Thanks 👍

(fix is 5c7d257)