Merge branch 'release/3.0.0-nullsafety.5'

Author: PlugFox

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 3.0.0-nullsafety.5 - 2021-03-24  
+## Fixed
+- Use `print` when `stdout` is unavailable
+  
+  
 ## 3.0.0-nullsafety.4 - 2021-03-24  
 ### Added  
 - Flutter example

lib/src/environment_specific/log_delegate_io.dart

@@ -5,12 +5,14 @@ import 'package:meta/meta.dart';
 import '../log_level.dart';
 import 'console_log_formatter_mixin.dart';
 import 'log_delegate.dart';
+import 'log_delegate_stub.dart';
 import 'message_formatting_pipeline.dart';
 import 'message_log_formatting_mixin.dart';
 
 /// {@nodoc}
 @internal
-LogDelegate createEnvironmentLogDelegate() => LogDelegateIO(io.stdout);
+LogDelegate createEnvironmentLogDelegate() =>
+    io.stdout.hasTerminal ? LogDelegateIO(io.stdout) : LogDelegateStub();
 
 /// {@nodoc}
 @internal

pubspec.yaml

@@ -3,7 +3,7 @@ description: >
   Cross-platform html/io Logger library with simple API.
   Manipulate with native and web console.
   Support ascii colorize output.
-version: 3.0.0-nullsafety.4
+version: 3.0.0-nullsafety.5
 repository: https://github.com/plugfox/l/tree/master
 issue_tracker: https://github.com/plugfox/l/issues
 homepage: https://github.com/plugfox/l