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chore: bump mathlib to 8319c83, fix breaking changes - #248

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Bump mathlib dependency to 8319c83: refactor(MeasureTheory): define eLpNorm f to be infinite when not AEStronglyMeasurable (#42406) (2026-09-11)
Previously at: 217ba06: chore: weaken unused hypotheses (Data and Order: thread on zulip) (#43660) (2026-09-10)

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The mathlib build cache is not warm for this commit. CI on this PR may
compile mathlib from source, which takes hours, instead of downloading
prebuilt oleans. Cache warming for LeanMachineLearning did not cover this commit —
open an issue at https://github.com/leanprover-community/downstream-reports/issues.

Closes #247

Failure log from the validation run: download (link expires after 1 year)


This PR bumps mathlib to an identified incompatible (first-known-bad) commit (8319c83) so you can reproduce and fix the incompatibility locally by checking out this branch.

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…orm f` to be infinite when not `AEStronglyMeasurable` (#42406) (2026-09-11)
@github-actions github-actions Bot added the dependency-incompatibility-fix Fix PR for a dependency incompatibility, opened by downstream-reports label Sep 12, 2026
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dependency-incompatibility-fix Fix PR for a dependency incompatibility, opened by downstream-reports

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Bumping mathlib to 8319c83 would break the build

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