Using FormatMessageHandler throws an 'System.FormatException: 'Input string was not in a correct format.''

[andpewpew]

Expectation
It should be expected when using the formatted log statement the result would be the same as when using the format message handler.

commonlogger.DebugFormat(templateString, arg) == commonLogger.Debug(m => m(templateString, arg))

But that is not the case and an exception is thrown (System.FormatException: 'Input string was not in a correct format.')

Reproduce
This behaver is reproducible and can be done by modifying a test with the below:
_commonLogger.DebugFormat(templateString, arg);
replace with
_commonLogger.Debug(m => m(templateString, arg));

The test in question can be found here: https://github.com/ChangemakerStudios/Common.Logging.Serilog/blob/master/Common.Logging.Serilog.Tests/SerilogCommonLoggerTests.cs#L71

The test will fail with the following

System.FormatException: 'Input string was not in a correct format.'

Possible fix
Fixing this seems to be removing the below line
string formatted = string.Format(formatProvider, message, parameters);
found at
https://github.com/ChangemakerStudios/Common.Logging.Serilog/blob/master/src/SerilogCommonLogger.cs#L561

Outro
Last release from this project is some time ago, but I hope, my message will be seen and a fixed can be created.

Best regards

[Jaben]

Fix in latest v5.0.0.