fix(runtime): dispatch node:stream super() through any bound-export heritage shape - #10649
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Included review availability: Your plan provides up to 8 included reviews per hour; 4 remain after this review. 📝 WalkthroughWalkthroughThe runtime now maps dynamically resolved ChangesStream subclass heritage
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@changelog.d/10649-stream-subclass-heritage.md`:
- Around line 3-10: Revise the changelog entry to limit the claim to the
supported node:stream constructors: Readable, Writable, Duplex, and Transform.
Explicitly state that PassThrough remains unsupported, or otherwise avoid broad
wording implying all node:stream subclasses are handled.
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changelog.d/10649-stream-subclass-heritage.mdcrates/perry-runtime/src/object/global_this/fetch_globals.rstest-files/gap_10448_stream_subclass_heritage_helper.cjstest-files/test_gap_10448_stream_subclass_heritage.ts
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| - **`node:stream` subclass overrides (`_transform`/`_write`/`_read`) are no | ||
| longer ignored when the heritage reaching `class X extends <base>` is a | ||
| local alias, an indirect subclass, a class expression, or a CJS | ||
| destructured `require('stream')` — the shape nodemailer uses in every | ||
| stream class it defines. `write()`/`push()` used to throw | ||
| `ERR_METHOD_NOT_IMPLEMENTED` because the override was never installed on | ||
| `this`; the dynamic `super()` dispatch now recognizes the resolved | ||
| bound-export value regardless of how the heritage expression reached it. |
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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win
🔎 Supported by static analysis
🏁 Script executed:
find .. -name AGENTS.md -o -name CONTRIBUTING.md -o -name 'README*.md' | head -30
rg -n -i 'changelog|PassThrough|node:stream' AGENTS.md CONTRIBUTING.md .github changelog.d 2>/dev/null | head -160
sed -n '650,750p' crates/perry-runtime/src/object/global_this/fetch_globals.rs
cat changelog.d/10649-stream-subclass-heritage.mdRepository: PerryTS/perry
Length of output: 17554
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sed -n '80,105p' CONTRIBUTING.md
sed -n '128,142p' CONTRIBUTING.md
cat changelog.d/README.mdRepository: PerryTS/perry
Length of output: 4639
Limit the changelog claim to supported constructors.
The dispatch handles Readable, Writable, Duplex, and Transform only. PassThrough remains unsupported because HIR does not recognize it as a node:stream parent. The broad node:stream wording can imply support that this change does not provide. Name the supported constructors or state the PassThrough limitation.
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In `@changelog.d/10649-stream-subclass-heritage.md` around lines 3 - 10, Revise
the changelog entry to limit the claim to the supported node:stream
constructors: Readable, Writable, Duplex, and Transform. Explicitly state that
PassThrough remains unsupported, or otherwise avoid broad wording implying all
node:stream subclasses are handled.
After applying the fix, consider running `coderabbit review --agent` for local
review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr
|
Same situation as #10634 and the same fix: this conflicts with |
…eritage shape
Generalizes js_fetch_or_value_super (crates/perry-runtime/src/object/global_this/fetch_globals.rs)
to recognize Readable/Writable/Duplex/Transform reached through a local alias, namespace member,
indirect subclass, or CJS destructured require('stream') -- the same pattern #10621/#10634 already
fixed for AsyncResource/AsyncLocalStorage. PassThrough is deliberately left unhandled (separate,
deeper HIR-level gap; see code comment).
Fixes #10448
b669f2e to
64af0b6
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2 participants
Summary
class X extends Transform(andWritable/Readable/Duplex) never called thesubclass's
_transform/_write/_readoverride unless the heritage identifier wasa shape
is_genuine_node_stream_parentrecognizes statically at HIR-lowering time(
crates/perry-hir/src/lower_decl/class_decl.rs). A local alias (const Alias = Transform), a namespace member reached through a CJS destructuredrequire('stream'),an indirect subclass, or a class expression all fell through to the dynamic
value-
super()dispatch, which invoked the boundstreamexport as a plainconstructor and dropped the result —
thisstayed an empty object, sowrite()/push()threwERR_METHOD_NOT_IMPLEMENTED.Fix
js_fetch_or_value_super(crates/perry-runtime/src/object/global_this/fetch_globals.rs)resolves the parent to a bound native-module export value exactly the way the
existing WASI arm does (
bound_native_callable_module_and_method, with thedynamic-parent fallback for a stale
parent_val) — that resolution is independent ofhow the heritage expression reached the value: a bare import, a local alias, a
namespace member, and a CJS destructured
require()all produce the identicalbound-closure representation, even though only some of those shapes are recognized
statically at HIR-lowering time. When the resolved value names
stream'sReadable/Writable/Duplex/Transform, it now runs the same runtime shim thestatically-recognized
extends Transformpath already uses(
js_node_stream_*_subclass_init, reused unchanged fromcrates/perry-runtime/src/node_stream_constructors/builders.rs), so every heritageshape installs the override onto
thisidentically.PassThroughis deliberately not handled here: HIR never recognizes it as anode:stream native parent at all, even via a bare import
(
canonical_native_parent_namelists Readable/Writable/Duplex/Transform but notPassThrough), so the hidden
_transformfield this shim reads is never pre-seededfor any
PassThroughheritage shape. That's a separate, deeper HIR-level gap;adding an arm here alone was confirmed empirically to change nothing for it.
Relationship to #10636
#10636 (open, not yet merged) independently fixes a related but narrower mechanism:
it stops treating a
const { Transform } = require('stream')binding inside aCommonJS-wrapper body as "locally shadowing" the native parent, so that one shape
routes through the static native-init path instead of ever reaching
js_fetch_or_value_superat all. Checked empirically (main + #10636's branch,no other changes, same gap test): #10636 alone fixes the CJS-destructured-require
sub-cases (
CjsTransform/CjsWritable/CjsReadable/CjsDuplex— the exactnodemailer shape) but leaves the ESM local-alias (
const Alias = Transform),indirect-subclass, and class-expression sub-cases failing exactly as on
main—#10636's own comment says as much ("does not change the... failure mode... for
indirect subclasses and class expressions"). So this is not a duplicate of
#10636: it fixes the cases #10636 explicitly disclaims, at the cost of some
overlap (both PRs add an arm to
js_fetch_or_value_super; whichever merges secondwill need a small rebase).
Tests
test-files/test_gap_10448_stream_subclass_heritage.ts+test-files/gap_10448_stream_subclass_heritage_helper.cjs— covers Transform viaimport/alias/namespace-member/indirect-subclass/class-expression, the CJS
destructured shapes for Transform/Writable/Readable/Duplex, a CJS namespace-member
control, and the ESM Writable/Readable/Duplex-via-import shapes.
main@ 68a5454, pristine build): N of M linesmismatch Node 26.5.1's output — see validation notes.
node --experimental-strip-typeswith the fix.Fixes #10448
Summary by CodeRabbit
Bug Fixes
node:streamsubclasses so custom transformation, writing, and reading behavior works correctly across aliases, indirect inheritance, class expressions, and CommonJS import patterns.ERR_METHOD_NOT_IMPLEMENTEDin these cases.Tests