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…tside its range Tree::hoist_dependency dedupes a peer row onto the copy a root package.json row placed at the top of node_modules even when the row's range rejects that copy. The resolver's "incorrect peer dependency" warning does not cover this: it only fires for peers the resolver itself bound out of range, so a root dependency bumped past a dependent's peer range, or a peer bound to a copy nested elsewhere in the tree, installed the root's copy for the dependent without saying anything. The dedupe now returns HoistedOutOfRange when a required peer's npm range rejects the version of the copy it is deduped onto, and the Filter build (the one tree per install that is written to node_modules) reports it with the dependent and the range. The Resolvable build, which also runs while loading and cleaning the lockfile, keeps its Rebind/Hoisted result and stays quiet, so the warning prints once per install. Optional peers are left alone, as the resolver leaves them, and copies without a version to compare (git, tarball, unversioned workspace) are not reported. Lockfile::package_version replaces the same npm/workspace version lookup OverrideMap::owner_of had inline.
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Updated 12:13 PM PT - Aug 15th, 2026
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Status: reproduced on the unfixed debug build with the registry fixtures (root bumped past a workspace member's peer range, the same with an npm dependent, and a fresh install where the peer's satisfying copy sits nested under another dependency while the root holds 2.0.0): all three install the root's copy for the dependent with nothing on stderr. With this branch each prints one |
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WalkthroughThe installer now centralizes package-version lookup and detects out-of-range peer versions during installed-tree hoisting. It warns for required peers, preserves optional-peer behavior, and adds coverage for workspace, dependency, repeated-install, and peer requirement cases. ChangesPeer hoisting compatibility
Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
Comment |
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I reviewed this PR and didn't find any bugs. Because it changes control flow in the hoisted tree builder (Tree::hoist_dependency / process_subtree) and adds a new user-facing warning to bun install, a human look would still be worthwhile.
Checked: the new HoistedOutOfRange arm is placement-equivalent to Hoisted in both Resolvable and Filter builds; optional peers still route through dedupe() so #37426's Rebind path is preserved; warn_peer_out_of_range reads only packages/string_bytes/catalogs (not the aliased buffers.resolutions); the OverrideMap::owner_of → Lockfile::package_version refactor is byte-for-byte behavior-preserving. Test fixtures (one-optional-peer-dep 1.0.1 vs 1.0.2) match the required/optional split the tests assume.
Extended reasoning...
Overview
The PR replaces a // TODO: warning about peer dependency version mismatch in Tree::hoist_dependency with an actual warning. When a required peer with an npm range is deduped onto the root package.json's copy and that copy's version falls outside the peer's range, the branch now returns HoistDependencyResult::HoistedOutOfRange(copy) instead of Hoisted. process_subtree treats this identically to Hoisted for placement, and additionally emits warn: incorrect peer dependency ... — only in the Filter build (the one whose tree is written to disk), so it prints once per install. Lockfile::package_version is a new helper extracted from OverrideMap::owner_of and reused for the version check. Six new tests in test/cli/install/hoist.test.ts cover the workspace-member sequence, fresh install with a nested satisfying copy, workspace packages standing in for npm names (in and out of range), and required vs optional peers.
Security risks
None. The change adds a diagnostic warning; it does not alter which packages are installed, where they land, or what is written to the lockfile. No untrusted-input parsing, no filesystem paths, no network.
Level of scrutiny
Medium-high. Tree.rs is the hoisted linker's placement algorithm — a hot, correctness-critical path where a subtle behavior change could silently alter install layouts across every project using the hoisted linker. The change is designed to be placement-neutral (and I confirmed the new match arm is), but it also introduces a new warning surface that will fire on bun install and bun prune (both use BuilderMethod::Filter), which is a user-facing behavior change worth a maintainer sign-off on wording and frequency.
Other factors
- The
Resolvable-mode path is unchanged in effect:HoistedOutOfRangeis only returned for required peers, for whichdedupe()previously returnedHoisted; the new arm does nothing inResolvablemode, matchingHoisted. Optional peers are gated out (!is_optional_peer()) so they still hitdedupe()→Rebind. warn_peer_out_of_rangecopies out theParentRefbefore dereferencing (matching the pattern elsewhere in the file) and readspackages.items_name/items_resolution,catalogs.resolve_range, andbuffers.string_bytes— none aliases the mutablebuilder.resolutionsborrow, so the safety contract onBuilder::lockfile()holds.- The
OverrideMap::owner_ofrefactor is a pure extraction: same match onResolutionTag::{Npm, Workspace, _}, sameworkspace_versionslookup keyed byitems_name_hash()[id]. - Tests use
VerdaccioRegistry,test.concurrent,runBunInstallwithallowWarnings, assert exact warning lines viatoEqual([...]), and verify placement (installedVersion, no nestednode_modules). Theone-optional-peer-depfixture's 1.0.1/1.0.2 split matches the required/optional cases. The PR description states each reporting test fails without the src change and the optional case fails if the optional-peer guard is removed. - The PR ran a broad set of install-related suites with no existing expectation changing.
Deferring because this is a control-flow change in a critical install path plus a new user-facing warning, not because anything looks wrong.
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One detail on the scope noted above: |
CI exports BUN_INSTALL_CACHE_DIR per test file, which overrides the bunfig cache the test dirs set, so the concurrent cases shared one cache and raced on the Windows lanes.
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| /// The version a semver range can be checked against: `None` for packages that | ||
| /// have none (git, tarball and folder resolutions, workspaces without a `version`). |
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If you need a paragraph-long comment to justify why the workaround is OK, the code is wrong — fix the code
| /// Same message as the resolver prints when it binds a peer to a version outside its | ||
| /// range, plus the dependent and the range, which this site knows. |
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If you need a paragraph-long comment to justify why the workaround is OK, the code is wrong — fix the code
| // Only the build whose tree is installed reports it: the `Resolvable` build | ||
| // also runs on every lockfile load and again when the lockfile is cleaned. |
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If you need a paragraph-long comment to justify why the workaround is OK, the code is wrong — fix the code
| // Optional peers take whatever the tree offers them (the resolver never binds | ||
| // them either), and a copy without a version (git, tarball, unversioned | ||
| // workspace) has nothing to check the range against. |
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If you need a paragraph-long comment to justify why the workaround is OK, the code is wrong — fix the code
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I reviewed this PR and didn't find any bugs. Because it adds user-visible diagnostic output from the hoisted tree builder (src/install/lockfile/Tree.rs) and makes a few UX/design calls — the extended message format vs. the resolver's shorter one, Filter-only reporting, and warning on every install for the nested-satisfier case — a human look would still be worthwhile.
What was reviewed:
- Placement is unchanged:
HoistedOutOfRangeis handled likeHoisted(no place/queue), and only fires for required peers so theResolvablebuild'sRebindpath for optional peers is preserved. OverrideMap::owner_ofrefactor is behavior-preserving;warn_peer_out_of_rangereads onlystring_bytes/packages/catalogs, not the aliasedbuffers.resolutions.- Tests cover the positive/negative matrix (workspace copy in/out of range, required vs optional peer), assert exact warning text and count, and use per-dir install caches for
test.concurrent; the referenced registry fixtures exist.
Extended reasoning...
Overview
This PR fills in a long-standing // TODO: warning about peer dependency version mismatch in Tree::hoist_dependency. When the hoisted linker serves a peer dependency from the root package.json's copy even though that copy's version is outside the peer's declared range, the install now prints warn: incorrect peer dependency "<copy>": "<dependent>" requires "<name>@<range>". Changes: a new HoistDependencyResult::HoistedOutOfRange variant; a Lockfile::package_version helper extracted from OverrideMap::owner_of (which now calls it); a #[cold] warn_peer_out_of_range formatter on Builder; the range check in the is_workspace_root_dependency branch; and six new test cases in test/cli/install/hoist.test.ts.
Security risks
None. This is a diagnostic warning added to the package manager log; no new inputs are parsed, no filesystem writes change, and placement in node_modules is identical to before.
Level of scrutiny
Medium-high. The hoisted tree builder is a load-bearing part of bun install that runs on every install and determines what lands in node_modules. The change is careful to keep placement identical (HoistedOutOfRange falls through the match with no placement/queue action, same as Hoisted's continue), and the !is_optional_peer() guard means the Resolvable build's Rebind path (#37426) is untouched. But it does introduce user-visible output whose format and frequency are design choices: the message extends the resolver's existing incorrect peer dependency "x@y" with dependent-and-range context, and it fires on every install for the nested-satisfier scenario while firing once for the bump-then-install scenario. The PR description justifies each choice thoroughly, and the comment-cop feedback about long code comments has been addressed in 3b3a0e0, but a maintainer familiar with install UX should confirm these are the right calls.
Other factors
The OverrideMap::owner_of refactor is byte-for-byte behavior-preserving (the workspace branch now looks up name_hash a second time inside package_version, which is trivial). The new warn_peer_out_of_range respects the Builder::lockfile() aliasing contract — it reads packages.items_resolution() (per-package Resolution column), not buffers.resolutions (the &mut-aliased dep→pkg map). add_warning_fmt returns (), so no discarded Result. Tests are well-constructed: exact-text assertions via peerWarnings(err).toEqual([...]) (also asserting the count), installedVersion/hasOwnNodeModules checks that the dependent is really served by the root copy, test.concurrent with per-test BUN_INSTALL_CACHE_DIR to avoid Windows cache races, and negative cases (in-range workspace at 1.5.0, optional peer at 1.0.2) that would fail if the guards were removed. Registry fixtures (one-optional-peer-dep@1.0.1/1.0.2, peer-deps-fixed, provides-peer-deps-1-0-0) all exist. No CODEOWNERS entry covers src/install/.
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Inline comments:
In `@test/cli/install/hoist.test.ts`:
- Around line 117-143: Add regression cases alongside the existing hoisted
workspace test for Git, tarball, and unversioned workspace resolutions, each
with a required peer dependency and the corresponding dependency hoisted. Assert
peerWarnings(err) is empty for every case while preserving installation
assertions, covering the resolution variants handled by
Lockfile::package_version.
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src/install/lockfile.rssrc/install/lockfile/OverrideMap.rssrc/install/lockfile/Tree.rstest/cli/install/hoist.test.ts
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I reviewed this PR and didn't find any bugs. Because it adds new user-facing warning behavior in the hoisted tree builder — a core bun install path — and makes a few design choices (Filter-build-only reporting, a message format that extends the resolver's), a human look would still be worthwhile.
Checked that HoistedOutOfRange leaves placement identical to the old dedupe() path (no continue needed — the match is the last statement in the loop), that optional peers still reach Rebind in Resolvable builds via the !is_optional_peer() gate, and that the OverrideMap::owner_of refactor onto Lockfile::package_version is behavior-preserving. Tests cover the required/optional and npm/workspace variant matrix and assert the warning is printed exactly once.
Extended reasoning...
Overview
Resolves the // TODO: warning about peer dependency version mismatch in Tree::hoist_dependency. Adds HoistDependencyResult::HoistedOutOfRange(PackageID), a warn_peer_out_of_range helper on Builder, and a Lockfile::package_version helper (extracted from OverrideMap::owner_of, which now delegates to it). process_subtree handles the new result by warning in Filter builds only; placement is unchanged. Six new concurrent tests in test/cli/install/hoist.test.ts cover workspace-member peers, npm dependents, workspace packages standing in for npm names (in and out of range), and required vs optional peers.
Security risks
None. The change reads lockfile state that is already in memory and appends a warning to the manager log. No new inputs are parsed and no filesystem or network operations are added.
Level of scrutiny
Medium-high. Tree::hoist_dependency and process_subtree decide the on-disk node_modules layout for every hoisted install, so any behavioral drift would be widely felt. I traced the new result through both METHOD values: for Resolvable a required peer that previously returned Hoisted now returns HoistedOutOfRange, whose arm is a no-op there, so the saved lockfile is unchanged; for Filter it adds the warning and otherwise behaves like Hoisted. Optional peers are excluded by the !is_optional_peer() gate, so #37426's Rebind path is preserved. The package_version extraction is byte-for-byte the logic owner_of had inline (npm → resolution.npm().version, workspace → workspace_versions lookup, else None).
Other factors
The PR makes a couple of design choices a maintainer should confirm: warning only from the Filter build (well-argued — Resolvable runs multiple times per install; bun prune's Filter build never prints its log afterward), and a message format that extends the resolver's incorrect peer dependency "X@V" with the dependent and required range. The comment-cop bot's four "paragraph-long comment" flags were addressed in 3b3a0e0. CI (#98152) was still building when I reviewed. Given this is core install logic with user-visible output changes, deferring rather than auto-approving.
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I reviewed this PR and didn't find any bugs. Because it adds a new user-facing warning to the hoisted install path and threads a new HoistDependencyResult variant through Tree::hoist_dependency/process_subtree, a human look from someone familiar with bun install would still be worthwhile to confirm the message format and the Filter-only reporting choice.
What was reviewed:
OverrideMap::owner_ofrefactor is behavior-preserving — same npm/workspace version lookup, now viaLockfile::package_version.- Placement is unchanged:
HoistedOutOfRangefalls through likeHoisted, and optional peers still hitdedupe()→Rebindin the Resolvable build (the #37426 path is intact). warn_peer_out_of_rangereadspackages.items_resolution()(notbuffers.resolutions), so it stays within theBuilder::lockfile()aliasing contract.- Tests pin the exact warning text for npm/workspace copies and pin silence for unversioned-workspace and
file:tarball copies (the CodeRabbit ask is covered by 9166d3c).
Extended reasoning...
Overview
The PR replaces a // TODO: warning about peer dependency version mismatch in Tree::hoist_dependency with an actual warning. It adds Lockfile::package_version() (extracted from OverrideMap::owner_of, which now calls it), a new HoistDependencyResult::HoistedOutOfRange(PackageID) variant, and Builder::warn_peer_out_of_range(). When a required peer with an npm range is deduped onto the root's copy and that copy's version fails satisfies(), the branch returns HoistedOutOfRange instead of dedupe(); process_subtree emits the warning only for BuilderMethod::Filter. ~170 lines of new tests in test/cli/install/hoist.test.ts cover npm, workspace (versioned in/out of range, unversioned), file: tarball, and required-vs-optional peers.
Security risks
None. The change is a diagnostic warning added to the install log; it does not alter placement, resolution, filesystem writes, or trust checks. package_version() reads only in-memory lockfile columns.
Level of scrutiny
Medium-high. Tree.rs is core to the hoisted linker and runs on every bun install. While the actual behavior change is additive (a warning on a path that already exists), the correctness depends on subtle invariants: the Resolvable-vs-Filter distinction, the Rebind path for optional peers from #37426, and the Builder::lockfile() aliasing contract with self.resolutions. I traced each of these and found them preserved — optional peers short-circuit rejected to false so they still return dedupe(), and the warning helper reads package resolutions (not the aliased dependency-resolution buffer). Still, the new warning message format extends the resolver's existing incorrect peer dependency text with a "<dependent>@<res>" requires "<name>@<range>" suffix, which is a user-facing surface change a maintainer should sign off on.
Other factors
The PR description is unusually thorough (mechanism, why Filter-only, why optional peers are excluded, why git/tarball are silent, before/after output, and a list of ~25 install test suites re-run). The github-actions comment-cop flags were addressed in 3b3a0e0. The CodeRabbit request for unversioned-workspace and tarball silent-case tests is addressed in 9166d3c (both are in the test.concurrent.each matrix). No CODEOWNERS entry covers these paths. The bug hunting system found nothing. Given the depth of the change to install semantics and the new user-visible message, deferring rather than auto-approving.
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Closing in favor of #41936, which covers this case (the hoisted tree serving a peer from a root copy outside its range) as part of moving the peer range check into both linkers: the same warning now also fires for the isolated linker and for copies the resolver itself bound out of range, and it names the dependent and the range (#7403). The hoisted tests from this PR map onto the |
Problem
node_modulesis served by the root's copy even when its range rejects it (Tree::hoist_dependency, theis_workspace_root_dependencybranch insrc/install/lockfile/Tree.rs, which carried a// TODO: warning about peer dependency version mismatch). Nothing is printed, on that install or on any later one.peer-deps-fixed@1.0.0has a peer onno-deps@^1.0.0):no-deps: ^1.0.0plus a workspace member with that peer,bun install, then change the root entry to^2.0.0and install again: the output is+ no-deps@2.0.0, exit 0, and the member now getsno-deps@2.0.0. The resolver only re-resolves the root's row;redirect_dependentsleaves the member's peer on 1.1.0 because its range rejects 2.0.0, and it is this dedupe that moves it.no-deps: 2.0.0,peer-deps-fixed, andprovides-peer-deps-1-0-0(which depends onno-deps@1.0.0): a fresh install binds the peer to the nested 1.0.0, so the resolver's ownwarn: incorrect peer dependencynever fires, and the tree then serves it 2.0.0 on this and every following install.get_or_put_resolved_package,PackageManagerEnqueue.rs) only covers peers the resolver itself bound out of range, so the same package.json warns when installed from scratch and is silent when reached through either sequence above.Fix
HoistDependencyResult::HoistedOutOfRange(copy)instead ofdedupe()when the peer is required, its range is an npm range, and the copy has a version that the range rejects. Placement is unchanged:process_subtreetreats the result exactly likeHoisted.Filterbuild reports it:warn: incorrect peer dependency "no-deps@2.0.0": "pkg1@workspace:packages/pkg1" requires "no-deps@^1.0.0". That build is the one tree per install that is written tonode_modules(install_hoisted_packages), so the warning prints once per install and describes what was actually installed. TheResolvablebuild also runs on every lockfile load and again inCloner::flush, so reporting from it would print two or three times per install; it stays quiet. (bun prunebuilds aFiltertree as well, but never prints the log afterwards, so it stays silent too.)dedupe(), so theResolvablebuild still returnsRebindfor them (install: keep optional peer bindings when cleaning the lockfile #37426) and nothing is reported, matching the resolver, which never binds or warns about optional peers (enqueue_dependency_with_main_and_success_fnreturns early on them). The copy's version comes fromLockfile::package_version, which knows npm versions and versioned workspaces, so a workspace package standing in for an npm name is reported when its version is out of range and not reported when it is in range; git, tarball and unversioned workspace copies have nothing to compare and are not reported.Lockfile::package_versionis the npm/workspace version lookupOverrideMap::owner_ofhad inline;owner_ofnow calls it.test/cli/install/hoist.test.ts, hoisted linker, all asserting the exact warning line(s) printed and that the dependent has no nestednode_modules(it really is served by the root's copy): the workspace member sequence above (one line, printed once); the fresh install with the nested satisfying copy (one line, and again on a reinstall); the root providingno-depsas a workspace at 2.0.0 (reported as"no-deps@workspace:packages/no-deps"), at 1.5.0 (nothing), without a version (nothing), and as afile:tarball of 2.0.0 (nothing, no version to compare; git would take the sameNonearm); andone-optional-peer-depleft bound to a survivingno-deps@1.0.0when the root moves to 2.0.0, in its required (1.0.1, reported) and optional (1.0.2, nothing) versions. The four reporting cases fail without thesrc/change (nothing is printed); the optional case fails if the optional-peer condition is removed; the quiet cases pin theNoneand in-range arms of the version check.bun-install-registry,bun-install,bun-lock,bun-lockb,bun-workspaces,bun-update,bun-update-transitive,bun-update-lockfile-sync,bun-add,bun-add-catalog,bun-add-filter,bun-remove,bun-dedupe,bun-prune,bun-audit,bun-pm-why,bun-pm-licenses,catalogs,nested-overrides,frozen-lockfile-pruned,test-dev-peer-dependency-priority,isolated-install,isolated-relink,migrate-bun-lockb-v2and the migration suites. No existing expectation changed;bun-install.test.tsonly fails on the tests that need external hosts, the same as without this change.Background
buffers.dependencies[i]), andbuffers.resolutions[i]is the package it is bound to. The root package.json is package 0; its rows include the workspace members.Tree.rs) walks rows breadth-first and tries to place each one as high innode_modulesas possible. When a level already holds a different package under the same name, a regular row nests under its dependent; a peer row is instead deduped onto the existing copy when the copy satisfies its range, or unconditionally when the copy was placed by a root row. A deduped row places nothing, so its own package is left out of the tree and out ofbun.lock.Resolvablebuilds (every row, for the saved lockfile) whenbun.lockis loaded and again when the lockfile is cleaned before saving, and oneFilterbuild (rows disabled by os/cpu,--omitor workspace filters left out) whose tree is what the hoisted installer writes to disk. The isolated linker does not use this tree for installing, so nothing changes for it.Resolvablebuild moves that binding (Rebind) when it dedupes one, so the saved lockfile and the installed tree agree.Before and after, debug build, registry fixtures
Workspace member sequence (root
no-deps^1.0.0then^2.0.0, memberpkg1with peerno-deps@^1.0.0), second install:Fresh install of
peer-deps-fixed@1.0.0,no-deps@2.0.0,provides-peer-deps-1-0-0@1.0.0: before, nothing on stderr beyond the progress lines on the first install and nothing at all on the second and on--frozen-lockfile; after,warn: incorrect peer dependency "no-deps@2.0.0": "peer-deps-fixed@1.0.0" requires "no-deps@^1.0.0"once on each of the three.Unchanged for comparison, a fresh install of the root
^2.0.0+pkg1package.json files prints the resolver'swarn: incorrect peer dependency "no-deps@2.0.0"once and is quiet on the following install, before and after.