test: fix panic in TestManager and TestDoDDLJobQuit in nextgen

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #61702

Problem Summary:

What changed and how does it work?

crossks_test.TestManager and "test_test.TestDoDDLJobQuit" panic previously, we fix them in this pr

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @D3Hunter. Thanks for your PR.

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[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.7409%. Comparing base (72427c5) to head (e32d297).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #63324        +/-   ##
================================================
+ Coverage   72.7890%   74.7409%   +1.9519%     
================================================
  Files          1832       1878        +46     
  Lines        495785     504156      +8371     
================================================
+ Hits         360877     376811     +15934     
+ Misses       112972     103949      -9023     
- Partials      21936      23396      +1460     

Flag	Coverage Δ
integration	48.4662% <0.0000%> (?)
unit	72.2520% <33.3333%> (-0.0061%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.8700% <ø> (ø)
parser	∅ <ø> (∅)
br	63.2863% <ø> (+16.8000%)	⬆️

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[Benjamin2037]

LGTM

[D3Hunter]

/retest

[tiprow]

@D3Hunter: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

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/retest

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-09-02 05:59:41.215743176 +0000 UTC m=+851873.093574131: ☑️ agreed by Benjamin2037.
• 2025-09-02 06:20:31.444772745 +0000 UTC m=+853123.322603700: ☑️ agreed by CbcWestwolf.

[D3Hunter]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, CbcWestwolf, D3Hunter

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Needs approval from an approver in each of these files:

• OWNERS [Benjamin2037,CbcWestwolf,D3Hunter]
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