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test: Deflake Corepack prepare lock on Windows#12873

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May 19, 2026
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test: Deflake Corepack prepare lock on Windows#12873
anthonyshew merged 1 commit into
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anthonyshew/deflake-corepack-prepare-lock-windows

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@anthonyshew

@anthonyshew anthonyshew commented May 19, 2026

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Why

Windows CI can report Access is denied while parallel Rust tests contend over the shared Corepack prepare directory lock. That fails unrelated integration tests before they exercise their assertions.

What

Treat transient Windows PermissionDenied during Corepack lock acquisition as lock contention and retry until the existing timeout. Non-lock errors still fail immediately.

How

Verified with:

  • cargo nextest run -p turbo --test affected_test test_affected_dependency_changed
  • pre-push hook: pnpm exec lint-staged, turbo run format check:toml, cargo fmt --check, cargo lint, cargo check --workspace

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@anthonyshew anthonyshew requested a review from a team as a code owner May 19, 2026 13:40
@anthonyshew anthonyshew requested review from tknickman and removed request for a team May 19, 2026 13:40
@anthonyshew anthonyshew enabled auto-merge (squash) May 19, 2026 13:48
@anthonyshew anthonyshew merged commit 53c9b4b into main May 19, 2026
41 checks passed
@anthonyshew anthonyshew deleted the anthonyshew/deflake-corepack-prepare-lock-windows branch May 19, 2026 13:51
@github-actions github-actions Bot mentioned this pull request May 20, 2026
Merged
anthonyshew pushed a commit that referenced this pull request May 20, 2026
@github-actions
release(turborepo): 2.9.15-canary.4 (#12905)
9f289d9 
## Release v2.9.15-canary.4

> [!CAUTION]
> Versioned docs aliasing FAILED. [View
logs](https://github.com/vercel/turborepo/actions/runs/26178036628)

### Changes

- release(turborepo): 2.9.15-canary.3 (#12814) (`d92bfcb`)
- fix: Avoid path-racy chmod during directory restore (#12815)
(`c62c92b`)
- fix: Prevent cache restore symlink race writes (#12817) (`0f167cf`)
- chore: Deny Rust panic extraction by default (#12818) (`958fc4e`)
- fix: Make structured log symlink defense race-safe (#12821)
(`46df4de`)
- fix: Preserve Bun alias child packages (#12822) (`cbfef22`)
- fix: Avoid UTF-8 panics at boundaries (#12823) (`a9b43ba`)
- fix: Preserve non-UTF-8 Git path boundaries (#12826) (`85ba487`)
- fix: Create daemon dirs with private permissions (#12827) (`aca956e`)
- fix: Return Berry lockfile errors instead of panicking (#12828)
(`3fd29a3`)
- fix: Isolate Corepack state in integration tests (#12831) (`f49f23b`)
- ci: Use larger Windows runners for Rust tests (#12832) (`7618d6e`)
- docs: Add `with-vite-module-federation` example (#12794) (`2209f61`)
- test: Run Rust tests without partitioning (#12833) (`e53c512`)
- chore: Remove `TaskHashTracker`-based `expect()` calls (#12836)
(`a10a5fe`)
- chore: Deduplicate hash canonicalization (#12837) (`795a912`)
- fix: Prevent Windows process drain hangs (#12838) (`030f50b`)
- fix: Refactor execsync to execfilesync for Shell command built from
environment values (#12829) (`a410750`)
- test: Bound vt100 random quickcheck (#12839) (`8f9eac2`)
- fix: Validate daemon discovery responses (#12840) (`f3268b2`)
- fix: Store `PackageGraph` root invariants (#12841) (`67d733d`)
- chore: Avoid engine graph node expects (#12842) (`639c535`)
- test: Make Rust tests parallel-safe (#12843) (`dd34c30`)
- fix: Avoid graph utility node lookup panics (#12844) (`8beff2e`)
- fix: Avoid graph walker `expect()` calls (#12845) (`0734316`)
- fix: Remove fs panic extraction lints (#12846) (`d6396de`)
- fix: Remove fixed map panic extraction calls (#12847) (`412dc00`)
- fix: Remove devtools WebSocket panics (#12850) (`2d11941`)
- fix: Remove json rewrite panic lint allow (#12848) (`88709b4`)
- fix: Remove turborepo-types panic lint allows (#12849) (`9d2cda3`)
- chore: Remove turborepo-hash build expect (#12851) (`c271628`)
- fix: Remove napi panic lint allows (#12852) (`9d631fe`)
- fix: Avoid globwatch expect calls (#12853) (`800b355`)
- fix: Remove LSP expect callsites (#12854) (`5a22478`)
- fix: Remove scope panic lint allows (#12855) (`98cacad`)
- fix: Remove task hash panic lints (#12856) (`c727e30`)
- fix: Remove frameworks panic lint allows (#12857) (`6a5e891`)
- fix: Remove microfrontends proxy expect lint allow (#12859)
(`787eee6`)
- fix: Avoid API client expect calls (#12858) (`43d3229`)
- fix: Avoid task executor expect calls (#12860) (`709ebd2`)
- fix: Remove turbo-trace unwrap callsite (#12863) (`23ed3ac`)
- fix: Remove Vercel API mock expect usage (#12862) (`0386df2`)
- fix: Remove vt100 expect lint allow (#12861) (`db1ee55`)
- fix: Remove turborepo-shim expect callsites (#12864) (`6b7c2c7`)
- test: Deflake daemon existing process test (#12865) (`1c57b5b`)
- fix: Avoid repository NAPI unwrap calls (#12866) (`459d1e6`)
- fix: Remove pidlock panic callsites (#12867) (`aacfcc6`)
- fix: Remove telemetry panic callsites (#12868) (`9968f36`)
- chore: Remove Rust re-export shims (#12870) (`0c7b052`)
- fix: Remove turbo-json panic lint allows (#12869) (`3eb13fd`)
- fix: Remove `globwalk`'s `expect()` callsites (#12871) (`ca42137`)
- fix: Remove `turbopath`'s `expect()` callsites (#12872) (`e781dbe`)
- test: Deflake Corepack prepare lock on Windows (#12873) (`53c9b4b`)
- fix: Remove signals panic callsites (#12874) (`b5e3b6d`)
- fix: Remove turbo-trace expect allow (#12876) (`67657e5`)
- fix: Remove Vercel API mock unwrap usage (#12877) (`dd99f86`)
- fix: Remove task executor unwrap usage (#12878) (`f16c120`)
- fix: Remove run summary expect usage (#12879) (`2670768`)
- fix: Remove microfrontends proxy unwrap usage (#12880) (`80da7a6`)
- fix: Remove api client unwrap usage (#12881) (`73f3c1b`)
- fix: Remove globwalk unwrap usage (#12883) (`a058336`)
- fix: Remove UI `expect()` usage (#12882) (`843515e`)
- fix: Remove microfrontends expect usage (#12885) (`91d5ac0`)
- fix: Remove `boundaries`'s `expect()` usage (#12887) (`4ae4b19`)
- fix: Remove `turborepo-process`'s `unwrap()` usage (#12888)
(`7badbb5`)
- fix: Remove UI unwrap usage (#12889) (`8c4316e`)
- fix: Remove microfrontends unwrap allow (#12890) (`26168cd`)
- fix: Remove `turborepo-process`'s `expect()` usage (#12891)
(`f3e8a42`)
- fix: Remove scm expect usage (#12893) (`4c0a0e0`)
- fix: Remove auth unwrap usage (#12886) (`a2eed47`)
- fix: Remove `turbopath`'s `unwrap()` usage (#12884) (`e1f2003`)
- fix: Remove `auth`'s `expect()` usage (#12895) (`d13dee7`)
- fix: Remove wax unwrap usage (#12899) (`04c99fb`)
- fix: Remove scm unwrap usage (#12897) (`715cd2c`)
- fix: Remove `turborepo-boundaries`'s `unwrap()` usage (#12896)
(`4484b36`)
- fix: Remove daemon unwrap usage (#12898) (`643b982`)
- fix: Include lockfile-changed packages in affected tasks (#12900)
(`81cae94`)
- fix: Remove `turborepo-wax`'s `expect()` usage (#12901) (`18816eb`)
- fix: Remove `turborepo-filewatch`'s `expect()` usage (#12903)
(`d1dff11`)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
@github-actions github-actions Bot mentioned this pull request May 26, 2026
Merged
anthonyshew pushed a commit that referenced this pull request May 26, 2026
@github-actions
release(turborepo): 2.9.15 (#12955)
c85d410 
## Release v2.9.15

> [!CAUTION]
> Versioned docs aliasing FAILED. [View
logs](https://github.com/vercel/turborepo/actions/runs/26478247978)

### Changes

- release(turborepo): 2.9.14 (#12805) (`da36727`)
- fix: Prune package.json workspaces (#12808) (`aea4138`)
- fix: Wait for process trees before task completion (#12809)
(`a3b4d94`)
- release(turborepo): 2.9.15-canary.1 (#12810) (`f7b9d3a`)
- ci: Sign macOS release binaries (#12811) (`fe3b84f`)
- release(turborepo): 2.9.15-canary.2 (#12812) (`c34a86b`)
- fix: Prevent cache archive symlink reads (#12813) (`ab90c81`)
- release(turborepo): 2.9.15-canary.3 (#12814) (`d92bfcb`)
- fix: Avoid path-racy chmod during directory restore (#12815)
(`c62c92b`)
- fix: Prevent cache restore symlink race writes (#12817) (`0f167cf`)
- chore: Deny Rust panic extraction by default (#12818) (`958fc4e`)
- fix: Make structured log symlink defense race-safe (#12821)
(`46df4de`)
- fix: Preserve Bun alias child packages (#12822) (`cbfef22`)
- fix: Avoid UTF-8 panics at boundaries (#12823) (`a9b43ba`)
- fix: Preserve non-UTF-8 Git path boundaries (#12826) (`85ba487`)
- fix: Create daemon dirs with private permissions (#12827) (`aca956e`)
- fix: Return Berry lockfile errors instead of panicking (#12828)
(`3fd29a3`)
- fix: Isolate Corepack state in integration tests (#12831) (`f49f23b`)
- ci: Use larger Windows runners for Rust tests (#12832) (`7618d6e`)
- docs: Add `with-vite-module-federation` example (#12794) (`2209f61`)
- test: Run Rust tests without partitioning (#12833) (`e53c512`)
- chore: Remove `TaskHashTracker`-based `expect()` calls (#12836)
(`a10a5fe`)
- chore: Deduplicate hash canonicalization (#12837) (`795a912`)
- fix: Prevent Windows process drain hangs (#12838) (`030f50b`)
- fix: Refactor execsync to execfilesync for Shell command built from
environment values (#12829) (`a410750`)
- test: Bound vt100 random quickcheck (#12839) (`8f9eac2`)
- fix: Validate daemon discovery responses (#12840) (`f3268b2`)
- fix: Store `PackageGraph` root invariants (#12841) (`67d733d`)
- chore: Avoid engine graph node expects (#12842) (`639c535`)
- test: Make Rust tests parallel-safe (#12843) (`dd34c30`)
- fix: Avoid graph utility node lookup panics (#12844) (`8beff2e`)
- fix: Avoid graph walker `expect()` calls (#12845) (`0734316`)
- fix: Remove fs panic extraction lints (#12846) (`d6396de`)
- fix: Remove fixed map panic extraction calls (#12847) (`412dc00`)
- fix: Remove devtools WebSocket panics (#12850) (`2d11941`)
- fix: Remove json rewrite panic lint allow (#12848) (`88709b4`)
- fix: Remove turborepo-types panic lint allows (#12849) (`9d2cda3`)
- chore: Remove turborepo-hash build expect (#12851) (`c271628`)
- fix: Remove napi panic lint allows (#12852) (`9d631fe`)
- fix: Avoid globwatch expect calls (#12853) (`800b355`)
- fix: Remove LSP expect callsites (#12854) (`5a22478`)
- fix: Remove scope panic lint allows (#12855) (`98cacad`)
- fix: Remove task hash panic lints (#12856) (`c727e30`)
- fix: Remove frameworks panic lint allows (#12857) (`6a5e891`)
- fix: Remove microfrontends proxy expect lint allow (#12859)
(`787eee6`)
- fix: Avoid API client expect calls (#12858) (`43d3229`)
- fix: Avoid task executor expect calls (#12860) (`709ebd2`)
- fix: Remove turbo-trace unwrap callsite (#12863) (`23ed3ac`)
- fix: Remove Vercel API mock expect usage (#12862) (`0386df2`)
- fix: Remove vt100 expect lint allow (#12861) (`db1ee55`)
- fix: Remove turborepo-shim expect callsites (#12864) (`6b7c2c7`)
- test: Deflake daemon existing process test (#12865) (`1c57b5b`)
- fix: Avoid repository NAPI unwrap calls (#12866) (`459d1e6`)
- fix: Remove pidlock panic callsites (#12867) (`aacfcc6`)
- fix: Remove telemetry panic callsites (#12868) (`9968f36`)
- chore: Remove Rust re-export shims (#12870) (`0c7b052`)
- fix: Remove turbo-json panic lint allows (#12869) (`3eb13fd`)
- fix: Remove `globwalk`'s `expect()` callsites (#12871) (`ca42137`)
- fix: Remove `turbopath`'s `expect()` callsites (#12872) (`e781dbe`)
- test: Deflake Corepack prepare lock on Windows (#12873) (`53c9b4b`)
- fix: Remove signals panic callsites (#12874) (`b5e3b6d`)
- fix: Remove turbo-trace expect allow (#12876) (`67657e5`)
- fix: Remove Vercel API mock unwrap usage (#12877) (`dd99f86`)
- fix: Remove task executor unwrap usage (#12878) (`f16c120`)
- fix: Remove run summary expect usage (#12879) (`2670768`)
- fix: Remove microfrontends proxy unwrap usage (#12880) (`80da7a6`)
- fix: Remove api client unwrap usage (#12881) (`73f3c1b`)
- fix: Remove globwalk unwrap usage (#12883) (`a058336`)
- fix: Remove UI `expect()` usage (#12882) (`843515e`)
- fix: Remove microfrontends expect usage (#12885) (`91d5ac0`)
- fix: Remove `boundaries`'s `expect()` usage (#12887) (`4ae4b19`)
- fix: Remove `turborepo-process`'s `unwrap()` usage (#12888)
(`7badbb5`)
- fix: Remove UI unwrap usage (#12889) (`8c4316e`)
- fix: Remove microfrontends unwrap allow (#12890) (`26168cd`)
- fix: Remove `turborepo-process`'s `expect()` usage (#12891)
(`f3e8a42`)
- fix: Remove scm expect usage (#12893) (`4c0a0e0`)
- fix: Remove auth unwrap usage (#12886) (`a2eed47`)
- fix: Remove `turbopath`'s `unwrap()` usage (#12884) (`e1f2003`)
- fix: Remove `auth`'s `expect()` usage (#12895) (`d13dee7`)
- fix: Remove wax unwrap usage (#12899) (`04c99fb`)
- fix: Remove scm unwrap usage (#12897) (`715cd2c`)
- fix: Remove `turborepo-boundaries`'s `unwrap()` usage (#12896)
(`4484b36`)
- fix: Remove daemon unwrap usage (#12898) (`643b982`)
- fix: Include lockfile-changed packages in affected tasks (#12900)
(`81cae94`)
- fix: Remove `turborepo-wax`'s `expect()` usage (#12901) (`18816eb`)
- fix: Remove `turborepo-filewatch`'s `expect()` usage (#12903)
(`d1dff11`)
- fix: Remove `turborepo-cache`'s `expect()` usage (#12902) (`ccd358d`)
- fix: Remove `turborepo-daemon`'s `expect()` usage (#12904) (`a9d8836`)
- fix: Remove `turborepo-engine`'s `unwrap()` usage (#12906) (`5262b40`)
- fix: Remove filewatch unwrap usage (#12907) (`364c801`)
- fix: Remove engine expect usage (#12908) (`92ef87c`)
- fix: Remove cache unwrap usage (#12909) (`c08053c`)
- fix: Remove `turborepo-lockfiles` `expect()` usage (#12910)
(`756ae7c`)
- chore: Set pnpm minimum release age (#12912) (`1636a8c`)
- fix: Remove `turborepo-lockfiles`'s `unwrap()` usage (#12911)
(`40f8d8f`)
- fix: Remove `turborepo-vt100`'s `unwrap()` usage (#12913) (`c7482f9`)
- release(turborepo): 2.9.15-canary.4 (#12905) (`9f289d9`)
- fix: Remove `turborepo-lib`'s `unwrap()` usage (#12915) (`a8ce590`)
- fix: Remove `turborepo-lib`'s `expect()` usage (#12914) (`d1745a6`)
- fix: Remove shim test unwrap usage (#12917) (`0d98ca3`)
- fix: Remove turbo json test unwrap allowance (#12918) (`01367e9`)
- fix: Remove run summary test unwrap usage (#12916) (`88745d1`)
- release(turborepo): 2.9.15-canary.5 (#12919) (`b44d419`)
- fix: Restore task completion semantics (#12923) (`1a71128`)
- fix: Preserve nested Bun workspace dependency versions (#12924)
(`a77a0e5`)
- release(turborepo): 2.9.15-canary.6 (#12925) (`f675858`)
- fix: Restore release PR auto-merge (#12927) (`155e672`)
- perf: Index repo gitignore matchers (#12928) (`187a0fd`)
- ci: Disable incremental Rust test builds (#12929) (`8c7dbc6`)
- perf: Trim OpenTelemetry crate features (#12930) (`7f0afe7`)
- perf: Trim microfrontends proxy HTTP features (#12931) (`ac537a8`)
- fix: Accept `experimentalCI` object config (#12934) (`6f662f2`)
- release(turborepo): 2.9.15-canary.7 (#12935) (`0e56cdc`)
- fix: Restore a few internal invariant checks (#12933) (`767a9d4`)
- fix: Improve profile tracing coverage (#12936) (`3063672`)
- fix: Use build-scale OTel duration buckets (#12939) (`6ed6fb0`)
- fix: Preserve pnpm injected peer package entries (#12940) (`31123f4`)
- feat: Add heap allocation profiling (#12943) (`c7ad6f2`)
- release(turborepo): 2.9.15-canary.8 (#12945) (`06e81ea`)
- docs: Correct attribute presence claims in turborepo-otel (#12932)
(`8fc94f3`)
- chore(turbo-codemod): remove duplicate "in" in transforms path comment
(#12948) (`5fa3039`)
- chore: Switch Geist font imports to npm geist package (#12952)
(`ebebf41`)
- fix: Respect root gitignore during prune (#12953) (`f96ccc4`)
- fix: Harden OTEL endpoint validation (#12954) (`076ff97`)

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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@anthonyshew