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wire 2026-07-25
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JAX FIXES REMAT3 CONSTANT HANDLING CRASH, GOOGLE CLOUD PYTHON CENTRALIZES REST TRANSCODING

By RepoJournal · Filed · About Google · Composed from the cited sources · methodology

Matthew Johnson copybara-service Heba Alazzeh suztomo Sergei Lebedev sakthivelmanii
6 people shipped this
Matthew Johnson @mattjj 2 cited copybara-service @copybara-service 2 cited Heba Alazzeh @hebaalazzeh 2 cited suztomo @suztomo 2 cited Sergei Lebedev @superbobry sakthivelmanii @sakthivelmanii

Matthew Johnson patched a critical remat3 regression where closed-over constants were silently dropped, causing immediate crashes in production rematerialization pipelines [ref:1].

The remat3 flag flip exposed a subtle bug in _remat_jaxpr: to_jaxpr returns both jaxpr and constants, but the consts were discarded, leaving Jaxpr objects with constvars but no attached values [1] [2]. Any rematted computation capturing arrays (remat-of-jit patterns) would crash in pjit_staging_rule with mismatched input counts. Johnson's fix attaches constants via with_consts, mirroring how jaxpr constants are handled elsewhere. On the Google Cloud Python side, Heba Alazzeh shipped a centralized REST transcoding helper under google.api_core.gapic_v1.rest_transcoding [3] [4], collapsing redundant code from REST transport constructors and reducing serialization errors. Simultaneously, Mosaic GPU gained a layout inference rule for MemRefReshapeOp [5] and refactored GPU Interpret Mode to use GpuClockBundle for cleaner, less error-prone clock management [6]. Cloud Python also absorbed this week's API definition updates [7] and added agent identity credentials v1beta [8]. Across both repos, 27 commits and 23 PRs landed in the last 24 hours.

Action items

References

  1. [1] [remat3] fix failures / regressions, work with mutable arrays ↗ google/jax
  2. [2] [remat3] fix failures / regressions, work with mutable arrays ↗ google/jax
  3. [3] feat(api-core): centralize rest transcoding helpers (#17765) ↗ googleapis/google-cloud-python
  4. [4] feat(api-core): centralize rest transcoding helpers ↗ googleapis/google-cloud-python
  5. [5] [Mosaic GPU] Add layout inference rule for `MemRefReshapeOp`. ↗ google/jax
  6. [6] [Mosaic GPU] Refactor GPU Interpret Mode to use `GpuClockBundle`s ↗ google/jax
  7. [7] feat: update googleapis and regenerate ↗ googleapis/google-cloud-python
  8. [8] feat(google/cloud/agentidentitycredentials/v1beta): add google-cloud-agentidentitycredentials v1beta ↗ googleapis/google-cloud-python

$ ls google/reviews/ # the step-back reads

the week in review JAX drops legacy IFRT device APIs, google-auth adds 3.15 the month in review JAX free-threading push reshapes 0.11.2 and 0.12 cleanup
Full archive → Weekly reviews →

Quick answers

What shipped in Google on July 25, 2026?
Matthew Johnson patched a critical remat3 regression where closed-over constants were silently dropped, causing immediate crashes in production rematerialization pipelines [ref:1]. In total, 27 commits and 23 pull requests landed.
Who contributed to Google on July 25, 2026?
6 developers shipped this update, including Matthew Johnson, Sergei Lebedev, copybara-service, Heba Alazzeh, suztomo, and sakthivelmanii.
What were the notable Google updates?
[remat3] fix failures / regressions, work with mutable arrays, [remat3] fix failures / regressions, work with mutable arrays, and feat(api-core): centralize rest transcoding helpers (#17765).
♥

$ log Google --recent

JAX pins OpenXLA revision, disables overlap_test against older libtpu 5 shipped JAX adds type-2 and type-3 Hermitian eigensolves, lexsort batching cuts unique compile time 69 shipped JAX hijax flags read at call time, Spanner stops deleting multiplexed sessions 112 shipped Vertex AI client timeout fix, Compute v1 API regenerated 87 shipped

$ log --all # elsewhere on the wire

@vuejs Vue language tools stop calling registerHooks on buggy Node builds @openclaw OpenClaw's deslop sweep removes 1,000+ production lines

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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