yjhjstz opened a new pull request, #1392:
URL: https://github.com/apache/cloudberry/pull/1392
Previously, if a group reused statistics from its duplicate, appending new
statistics could cause a segmentation fault when trying to release a NULL
pointer. Fixed by appending directly to the duplicate's statistics instead.
Fixes #ISSUE_Number
```sql
#6 <signal handler called>
#7 0x00000000012436f2 in gpos::CRefCount::Check (this=0x0)
at
../../../../../../src/backend/gporca/libgpos/include/gpos/common/CRefCount.h:50
#8 0x000000000124387a in gpos::CRefCount::Release (this=0x0)
at
../../../../../../src/backend/gporca/libgpos/include/gpos/common/CRefCount.h:99
#9 0x00000000014b67a5 in gpopt::CGroup::AppendStats (this=0x7f3c857e48c8,
mp=0x83f1670, stats=0x874a0d0) at CGroup.cpp:895
#10 0x00000000014b84ca in gpopt::CGroup::PstatsRecursiveDerive
(this=0x7f3c857e48c8, pmpLocal=0x83f1670, pmpGlobal=0x83f1670,
prprel=0x7f3c858490e8, stats_ctxt=0x7f3c8583b280) at CGroup.cpp:1518
#11 0x000000000141a584 in gpopt::CExpressionHandle::DeriveStats
(this=0x7fff76b7b130, stats_ctxt=0x7f3c8583cf60,
fComputeRootStats=false) at CExpressionHandle.cpp:450
#12 0x00000000014c58e0 in gpopt::CGroupExpression::PstatsRecursiveDerive
(this=0x86b9318, pmpGlobal=0x83f1670, prprel=0x7f3c858491e8,
stats_ctxt=0x7f3c8583cf60, fComputeRootStats=false) at
CGroupExpression.cpp:1004
#13 0x00000000014b8160 in gpopt::CGroup::EspDerive (pmpLocal=0x86e6c88,
pmpGlobal=0x83f1670, pgexpr=0x86b9318, prprel=0x7f3c858491e8,
stats_ctxt=0x7f3c8583cf60, fDeriveChildStats=true) at CGroup.cpp:1426
#14 0x00000000014b88e4 in gpopt::CGroup::PgexprBestPromise
(this=0x7f3c857fbab0, pmpLocal=0x86e6c88, pmpGlobal=0x83f1670,
prprelInput=0x7f3c858491e8, stats_ctxt=0x7f3c8583cf60) at CGroup.cpp:1611
```
### What does this PR do?
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### Type of Change
- [ ] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature with breaking changes)
- [ ] Documentation update
### Breaking Changes
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### Test Plan
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- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Passed `make installcheck`
- [ ] Passed `make -C src/test installcheck-cbdb-parallel`
### Impact
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**Dependencies:**
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### Checklist
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- [ ] Added/updated documentation
- [ ] Reviewed code for security implications
- [ ] Requested review from [cloudberry
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