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bd2616539c
Automatic merge from submit-queue (batch tested with PRs 46681, 46786, 46264, 46680, 46805)
Fix for-loop and err definition
**What this PR does / why we need it**:
we can use j directly, it's odd to use i then get j through i.
we can put err definition into if{} , after all the para. was only used in if{}.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```