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v3.9.1 2020-04-06

• #2333: Previews of Flutter icons in gutter/hover tooltips have been restored.

v3.9.0 2020-04-03

Flutter: New Project Offline Mode

#1957/#2311: @ejabu Contributed a new setting dart.flutterCreateOffline that will cause Flutter: New Project to run in offline-mode.

Dart CLI Terminal Improvements

#2256/#2230/#2315/#2305/#2313: Running CLI apps in the terminal has received some improvements over the original release. Apps now run as real processes in a standard VS Code Terminal (instead of using a Pseudoterminal). This should resolve issues with certain keys (like backspace) not working correctly.

Note: You must be using Dart SDK v2.7.1 or later for this functionality to work.

Debugger

• #2282/#2283: The debugger should no longer get stuck in the running state if it pauses very quickly after being resumed.
• #2314: The debug adapter now users the debug adapter protocol’s runInTerminalRequest for terminal mode instead of proprietary events, improving compatibility with other editors.

Commands

• #2289: Dart: Run Test At Cursor is now a little more lax about the positions of the cursor, including the whole start/end line for a group/test.
• #2280: When running commands like Pub: Get Packages, the Output tab when no longer be shown automatically unless errors occur.

Editor

• #2296: Code snippets should no longer force the editor into “snippet mode” unnecessarily, preventing code completion from working.
• #2228/#2272: Flutter Outline now updates more reliably for files outside of your workspace.
• #2218: Color previews now appear in the gutter for colors using the Color.fromARGB/Color.RGBO constructors.
• #2140/#2270: Format Document should no longer break some unicode characters in long documents.

Testing

• #2312: The Dart: Run All Tests command can now be used if you’re already in a debug session.
• #2160: A new setting dart.allowTestsOutsideTestFolder controls whether files ending _test.dart outside of the test folder will be considered tests.

Preview: LSP

#2238/#2297: As part of ongoing work to migrate to the language server protocol, a new setting dart.previewLsp will force the analyzer to using the LSP protocol. This mode is not yet complete and has some known issues.