felipepessoto commented on code in PR #12829:
URL: https://github.com/apache/gluten/pull/12829#discussion_r3834511013


##########
.github/workflows/util/delta-spark-ut/README.md:
##########
@@ -193,6 +193,11 @@ Delta RoaringBitmapArray row index \d+ exceeds max 
representable value
 Delta bitmap row index cannot be negative: -?\d+
 ```
 
+That example is historical: the root cause was a Velox scan bug
+([velox#18535](https://github.com/facebookincubator/velox/issues/18535)), fixed
+upstream, so both patterns have since been removed and the suite is enforced
+again. It is kept here because it shows the shape of the mechanism.

Review Comment:
   Partly taken, in `9fee7d0`: the note now names the fix and where it landed — 
[velox#18536](https://github.com/facebookincubator/velox/pull/18536), picked up 
by the `dft-2026_08_21` pin — rather than just saying "fixed upstream".
   
   I left the merge-gating wording out of the README on purpose. "Do not merge 
until the pin includes this commit" was a property of this PR at this moment, 
not a durable fact about the harness: pins only move forward, so a permanent 
"requires pin >= X" note would describe a condition that is already true and 
can never become false again. The dependency belongs in the PR description 
instead, where it is actionable — and it is now satisfied, since main pins 
`dft-2026_08_21` and this branch is rebased onto that bump. (Your other comment 
correctly notes the description still quotes the old pin; that is being 
corrected.)



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