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Ubuntu is returning different results from macos #1209
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Identified by #1205.
I've made a private GitHub repo here which runs code on both ubuntu-latest and macos-latest that stores the full entity dataset as artifacts so I can see exactly which variables are different (have so far established the input data is the exact same, not modified by OS behaviour).
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nikhilwoodruff commentedon Jul 11, 2025
Think I've identified the bug as in parameter uprating- for a limited subset of parameters, we're not uprating in ubuntu, but are in macos. Here's two parameter trees in text files as proof.
Linux_parameters.txt
Darwin_parameters.txt
Document Ubuntu vs macOS reproducibility diagnosis (#1209)
Document Ubuntu vs macOS reproducibility diagnosis (#1209)
Correct the Ubuntu vs macOS cause and CI history
juaristi22 commentedon Oct 24, 2026
Closing as resolved. #1254 removed the import-time
BASELINE_GROWFACTORStable responsible for the ordering-sensitive uprating. The Linux CI migration in #2115 verified byte-identical processed parameter trees on macOS arm64, Ubuntu x86 and Ubuntu arm64, with matching test outcomes. The diagnosis and verification are recorded in the reproducibility page. #1223 was closed unmerged; it is not the fix being relied on here.