pingcap
[WIP] config: fix panic when some field is empty
What problem does this PR solve?
close https://github.com/pingcap/dm/issues/2028
What is changed and how it works?
Check List
Tests
- Unit test
- Integration test
- Manual test (add detailed scripts or steps below)
- No code
Code changes
- Has exported function/method change
- Has exported variable/fields change
- Has interface methods change
- Has persistent data change
Side effects
- Possible performance regression
- Increased code complexity
- Breaking backward compatibility
Related changes
- Need to cherry-pick to the release branch
- Need to update the documentation
- Need to update the
dm/dm-ansible - Need to be included in the release note
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