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Address collection-based meta arguments in GroupByApply#12099

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jacobtomlinson merged 2 commits intodask:mainfrom
rjzamora:fix-meta-collection
Oct 15, 2025
Merged

Address collection-based meta arguments in GroupByApply#12099
jacobtomlinson merged 2 commits intodask:mainfrom
rjzamora:fix-meta-collection

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@rjzamora rjzamora commented Oct 14, 2025

Addresses the case that a collection is passed into the meta argument for GroupByApply. Since Blockwise does not have a dedicated "meta" operand, it will treat this argument as an Expr dependency within Blockwise._divisions.

I'm not entirely sure if there is an easy way to guard against this in a more general way. For now, I just updated the assertion to mention this as a possible cause (in case it pops up in other places).

@rjzamora rjzamora self-assigned this Oct 14, 2025
@rjzamora rjzamora added dataframe bug Something is broken labels Oct 14, 2025
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Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

      9 files  +     1        9 suites  +1   3h 16m 44s ⏱️ + 22m 37s
 18 127 tests +     1   16 910 ✅ +     1   1 217 💤 ±    0  0 ❌ ±0 
162 217 runs  +18 047  150 100 ✅ +16 747  12 117 💤 +1 300  0 ❌ ±0 

Results for commit 87489cd. ± Comparison against base commit c039144.

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Thanks Rick!

@jacobtomlinson jacobtomlinson merged commit 2def769 into dask:main Oct 15, 2025
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