Different behavior for log() compared to print()

[jxstxn1]

I try to get my StackTraces logged.

It's working fine if I call: print(Chain.current().terse);

StackTrace

flutter: package:stacktrace_test/main.dart 36:35                  HomePage.build.<fn>
package:flutter/src/material/ink_well.dart 1183:21       _InkResponseState.handleTap
package:flutter/src/gestures/recognizer.dart 275:24      GestureRecognizer.invokeCallback
package:flutter/src/gestures/tap.dart 652:11             TapGestureRecognizer.handleTapUp
package:flutter/src/gestures/tap.dart 309:5              BaseTapGestureRecognizer._checkUp
package:flutter/src/gestures/tap.dart 242:7              BaseTapGestureRecognizer.handlePrimaryPointer
package:flutter/src/gestures/recognizer.dart 630:9       PrimaryPointerGestureRecognizer.handleEvent
package:flutter/src/gestures/pointer_router.dart 98:12   PointerRouter._dispatch
package:flutter/src/gestures/pointer_router.dart 143:9   PointerRouter._dispatchEventToRoutes.<fn>
dart:collection                                          _LinkedHashMapMixin.forEach
package:flutter/src/gestures/pointer_router.dart 141:18  PointerRouter._dispatchEventToRoutes
package:flutter/src/gestures/pointer_router.dart 127:7   PointerRouter.route
package:flutter/src/gestures/binding.dart 488:19         GestureBinding.handleEvent
package:flutter/src/gestures/binding.dart 468:22         GestureBinding.dispatchEvent
package:flutter/src/rendering/binding.dart 439:11        RendererBinding.dispatchEvent
package:flutter/src/gestures/binding.dart 413:7          GestureBinding._handlePointerEventImmediately
package:flutter/src/gestures/binding.dart 376:5          GestureBinding.handlePointerEvent
package:flutter/src/gestures/binding.dart 323:7          GestureBinding._flushPointerEventQueue
package:flutter/src/gestures/binding.dart 292:9          GestureBinding._handlePointerDataPacket

If I try it with: log('', stackTrace: Chain.current().terse) The outputted StackTrace contains Chain( StackTrace )

StackTrace

[log] Chain (package:stacktrace_test/main.dart 43:35                  HomePage.build.<fn>
      package:flutter/src/material/ink_well.dart 1183:21       _InkResponseState.handleTap
      package:flutter/src/gestures/recognizer.dart 275:24      GestureRecognizer.invokeCallback
      package:flutter/src/gestures/tap.dart 652:11             TapGestureRecognizer.handleTapUp
      package:flutter/src/gestures/tap.dart 309:5              BaseTapGestureRecognizer._checkUp
      package:flutter/src/gestures/tap.dart 242:7              BaseTapGestureRecognizer.handlePrimaryPointer
      package:flutter/src/gestures/recognizer.dart 630:9       PrimaryPointerGestureRecognizer.handleEvent
      package:flutter/src/gestures/pointer_router.dart 98:12   PointerRouter._dispatch
      package:flutter/src/gestures/pointer_router.dart 143:9   PointerRouter._dispatchEventToRoutes.<fn>
      dart:collection                                          _LinkedHashMapMixin.forEach
      package:flutter/src/gestures/pointer_router.dart 141:18  PointerRouter._dispatchEventToRoutes
      package:flutter/src/gestures/pointer_router.dart 127:7   PointerRouter.route
      package:flutter/src/gestures/binding.dart 488:19         GestureBinding.handleEvent
      package:flutter/src/gestures/binding.dart 468:22         GestureBinding.dispatchEvent
      package:flutter/src/rendering/binding.dart 439:11        RendererBinding.dispatchEvent
      package:flutter/src/gestures/binding.dart 413:7          GestureBinding._handlePointerEventImmediately
      package:flutter/src/gestures/binding.dart 376:5          GestureBinding.handlePointerEvent
      package:flutter/src/gestures/binding.dart 323:7          GestureBinding._flushPointerEventQueue
      package:flutter/src/gestures/binding.dart 292:9          GestureBinding._handlePointerDataPacket
      )

Is there any way to get the stacktrace logged without the surrounding Chain()?

Code Example

import 'dart:developer';

import 'package:flutter/material.dart';
import 'package:stack_trace/stack_trace.dart';

void main() {
  runApp(
    const App(),
  );
}

class App extends StatelessWidget {
  const App({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  const HomePage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Home Page'),
      ),
      body: Column(
        children: [
          ElevatedButton(
            onPressed: () {
              final chain = Chain.current();
              print(chain.terse);
            },
            child: const Text('Print Chain StackTrace'),
          ),
          ElevatedButton(
            onPressed: () {
              final chain = Chain.current();
              log('Test Message', stackTrace: chain.terse);
            },
            child: const Text('Log Chain StackTrace'),
          ),
          ElevatedButton(
            onPressed: () {
              final stackTrace = StackTrace.current;
              log('Test Message', stackTrace: stackTrace);
            },
            child: const Text('Log StackTrace'),
          ),
        ],
      ),
    );
  }
}

[osa1]

How do I run your code exactly? When I run it with flutter run, both in the browser and VM, the "Log ..." buttons don't do anything.

[jxstxn1]

@osa1 I produced the example on an iOS Emulator running from VS Code and reading the Debug Console in there.

I can reproduce the same behavior running on a Browser and reading the Debug Console in VS Code. However, I can also reproduce your behavior by reading the Browser Console, which is empty by default. If I add verbose to the levels, I can see the Log being logged as an Object: