[cherry-pick] fix fc unflatten miss key

[xingmingyyj]

PR Category

User Experience

PR Types

Bug fixes

Description

devPR:#78817

是否引起精度变化

否

[paddle-bot]

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[xingmingyyj]

/re-run all-failed

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release/3.4@7b42b0f). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...distributed/flex_checkpoint/dcp/load_state_dict.py	0.00%	15 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@              Coverage Diff               @@
##             release/3.4   #78818   +/-   ##
==============================================
  Coverage               ?    0.00%           
==============================================
  Files                  ?        1           
  Lines                  ?       15           
  Branches               ?        0           
==============================================
  Hits                   ?        0           
  Misses                 ?       15           
  Partials               ?        0           

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[risemeup1]

LGTM for coverage，覆盖率机制统计问题，本地验证可以跑到，且CI case的确跑到了

[sneaxiy]

LGTM