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Fix: avoid using methods.concat on empty lists#12096

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jacobtomlinson merged 1 commit intodask:mainfrom
tonyyuyiding:fix-concat-nocolumns
Oct 9, 2025
Merged

Fix: avoid using methods.concat on empty lists#12096
jacobtomlinson merged 1 commit intodask:mainfrom
tonyyuyiding:fix-concat-nocolumns

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github-actions bot commented Oct 9, 2025

Unit Test Results

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

      9 files  ±0        9 suites  ±0   3h 18m 33s ⏱️ + 3m 34s
 18 102 tests +1   16 885 ✅ + 3   1 217 💤 ±0  0 ❌  - 2 
161 992 runs  +9  149 876 ✅ +10  12 116 💤 +1  0 ❌  - 2 

Results for commit 27a80b0. ± Comparison against base commit fabab2a.

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Thank you!

@jacobtomlinson jacobtomlinson merged commit c60725b into dask:main Oct 9, 2025
24 of 25 checks passed
@tonyyuyiding tonyyuyiding deleted the fix-concat-nocolumns branch October 9, 2025 10:11
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dd.concat fails if data frames do not have any columns

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