Fix encoding 866 crash: fallback to UTF-8 when console encoding unavailable - #364
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…coding unavailable SharedIO.InitializeInput/Output/ErrorOutput accessed Console.InputEncoding and Console.Out/Console.Error without error handling. On systems where cp866 (or other console encodings) are not registered (e.g. Dynamo/Revit hosting environment, .NET Core), this threw ArgumentException: 'No data is available for encoding 866' Added TryGetConsoleEncoding() helper that wraps encoding access in try-catch and falls back to Encoding.UTF8 / TextWriter.Null when the console encoding is unavailable.
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Problem
SharedIO.InitializeInput()accessesConsole.InputEncodingwithout error handling. On Russian Windows this returns cp866, but in hosting environments like Dynamo (Autodesk Revit) or on .NET Core, the codepage data is unavailable, causing:This crashes
Python.CreateEngine()in IronPython.Fix
Added
TryGetConsoleEncoding()helper that wraps console encoding access in try-catch with fallback:Applied to:
InitializeInput()—Console.InputEncoding/Encoding.Default→ fallbackEncoding.UTF8InitializeOutput()—Console.Out→ fallbackTextWriter.NullInitializeErrorOutput()—Console.Error→ fallbackTextWriter.NullCompanion PR
This fix works together with IronLanguages/ironpython2#851 which adds
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance)inPythonContextstatic constructor for .NET Core/Standard.Testing
Verified with C# host simulating Dynamo environment — all tests pass.