Unable to launch flutter application on testing device ( Error: Expected an identifier, but got '..'. )

When I am trying to launch my flutter application on my device, I am getting this error

flutter run

Launching lib/main.dart on CPH1827 in debug mode...
../../../flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.2/lib/src/io_client.dart:32:9: Error: Expected an identifier, but got '..'.
        ..followRedirects = request.followRedirects                     
        ^^                                                              
                                                                        
                                                                        
FAILURE: Build failed with an exception.                                
                                                                        
* Where:                                                                
Script '/home/mir/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 904
                                                                        
* What went wrong:                                                      
Execution failed for task ':app:compileFlutterBuildDebug'.              
> Process 'command '/home/mir/flutter/bin/flutter'' finished with non-zero exit value 1
                                                                        
* Try:                                                                  
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
                                                                        
* Get more help at https://help.gradle.org                              
                                                                        
BUILD FAILED in 19s                                                     
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                        19.8s
Exception: Gradle task assembleDebug failed with exit code 1

How can I resolve it? Any help greatly appreciated.

Thanks