fix: UnsignedColumns idx out range

[guihouchang]

fix:#713

[atercattus]

Hello.
Can you add a test case (based on this) that will panic?

[atercattus]

Same fix is here and here

[guihouchang]

Hello. Can you add a test case (based on this) that will panic?

I don't know how to add this unit test.It looks very complicated. I need help

[lance6716]

Hello. Can you add a test case (based on this) that will panic?

I don't know how to add this unit test. It looks very complicated. I need help

Hi, do you find problems when try to use the test framework, or have no idea how to test it?

[guihouchang]

have no idea how to test it, plz show me a example

[lance6716]

have no idea how to test it, plz show me a example

In fact I don't use canal, do you have a real use case that will meet this problem? We can mimic that API invocation and binlog content.

[lance6716]

replaced by #856