Unexpect error when use DEFAULT() function in INSERT ... SET ... statement

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Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.

create table t1(a int default 1, b int default 2);
insert into t1 set b = default(a);
select * from t1;

2. What did you expect to see?

3. What did you see instead?

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?

Release Version: v4.0.0-alpha-730-g8d545a180

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Related issue: #13071 #12471 #11939

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UPDATE / REPLACE statement has same issue.