Error: Named parameter 'Element' is required and can't have a default value. required Element =super.value, ^^^^^^^ : Error: Expected identifier, but got 'super'. required Element =super.value, ^^^^^ Error: No named parameter with the name 'value'. value: this, ^^^^^ : Context: Found this candidate, but the arguments don't match. _ElementDiagnosticableTreeNode({ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ : Error: The superclass, 'DiagnosticableTreeNode', has no unnamed constructor that takes no arguments. _ElementDiagnosticableTreeNode({ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ : Error: No named parameter with the name 'value'. value: this, ^^^^^ : Context: Found this candidate, but the arguments don't match. _ElementDiagnosticableTreeNode({ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ FAILURE: Build failed with an exception. * Where: line: 1159 * What went wrong: Execution failed for task 'appcompileFlutterBuildDebug'.

Process 'command finished with non-zero exit value 1

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* Get more help at https://help.gradle.org BUILD FAILED in 6m 50s Exception: Gradle task assembleDebug failed with exit code 1