fix: Restore task completion semantics#12923
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anthonyshew
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## Release v2.9.15-canary.6 > [!CAUTION] > Versioned docs aliasing FAILED. [View logs](https://github.com/vercel/turborepo/actions/runs/26254241386) ### Changes - 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`) Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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anthonyshew
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## 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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Why
Recent process-tree completion changes made successful tasks wait for descendant process groups before unblocking dependents. That can turn short-lived processes into hangs. Task completion should be based on the declared command exiting successfully and output streams draining; descendant processes are a cleanup concern, not part of the success contract.
What
Restore direct-child success as the completion signal for non-persistent tasks, while cleaning up remaining descendants after output drain. Keep explicit shutdown behavior responsible for graceful process-tree termination.
How
Validation:
cargo fmt --package turborepo-processcargo test -p turborepo-process