v12.16.1 proposal #31781

MylesBorins · 2020-02-13T23:11:29Z

2020-02-18, Version 12.16.1 'Erbium' (LTS), @MylesBorins

Notable changes

Node.js 12.16.0 included 6 regressions that are being fixed in this release

Accidental Unflagging of Self Resolving Modules:

12.16.0 included a large update to the ESM implementation. One of the new features,
Self Referential Modules, was accidentally released without requiring the --experimental-modules
flag. This release is being made to appropriately flag the feature.

Process Cleanup Changed Introduced WASM-Related Assertion:

A change during Node.js process cleanup led to a crash in combination with
specific usage of WASM. This has been fixed by partially reverted said change.
A regression test and a full fix are being worked on and will likely be included
in future 12.x and 13.x releases.

Use Largepages Runtime Option Introduced Linking Failure:

A Semver-Minor change to introduce --use-largepages as a runtime option
introduced a linking failure. This had been fixed in master but regressed as the fix has not yet gone out
in a Current release. The feature has been reverted, but will be able to reland with a fix in a future
Semver-Minor release.

Async Hooks was Causing an Exception When Handling Errors:

Changes in async hooks internals introduced a case where an internal api call could be called with undefined
causing a process to crash. The change to async hooks was reverted. A regression test and fix has been proposed
and the change could re-land in a future Semver-Patch release if the regression is reliably fixed.

New Enumerable Read-Only Property on EventEmitter breaks @types/extend

A new property for enumerating events was added to the EventEmitter class. This
broke existing code that was using the @types/extend module for extending classses
as @types/extend was attemping to write over the existing field which the new
change made read-only. As this is the first property on EventEmitter that is
read-only this feature could be considered Semver-Major. The new feature has been
reverted but could re-land in a future Semver-Minor release if a non breaking way
of applying it is found.

Exceptions in the HTTP parser were not emitting an uncaughtException

A refactoring to Node.js interanls resulted in a bug where errors in the HTTP
parser were not being emitted by process.on('uncaughtException') when the async_hooks after
hook exists. The fix to this bug has been included in this release.

Commits

[51fdd759b9] - async_hooks: ensure event after been emitted on runInAsyncScope (legendecas) #31784
[7a1b0ac06f] - Revert "build: re-introduce --use-largepages as no-op" (Myles Borins) #31782
[a53eeca2a9] - Revert "build: switch realpath to pwd" (Myles Borins) #31782
[6d432994e6] - Revert "build: warn upon --use-largepages config option" (Myles Borins) #31782
[a5bc00af12] - Revert "events: allow monitoring error events" (Myles Borins)
[f0b2d875d9] - module: 12.x self resolve flag as experimental modules (Guy Bedford) #31757
[42b68a4e24] - src: inform callback scopes about exceptions in HTTP parser (Anna Henningsen) #31801
[065a32f064] - Revert "src: make --use-largepages a runtime option" (Myles Borins) #31782
[3d5beebc62] - Revert "src: make large_pages node.cc include conditional" (Myles Borins) #31782
[43d02e20e0] - src: keep main-thread Isolate attached to platform during Dispose (Anna Henningsen) #31795
[7a5954ef26] - src: fix -Winconsistent-missing-override warning (Colin Ihrig) #30549

This commit addresses the following warning: ../src/node_api.cc:28:19: warning: 'mark_arraybuffer_as_untransferable' overrides a member function but is not marked 'override' [-Winconsistent-missing-override] v8::Maybe<bool> mark_arraybuffer_as_untransferable( ^ ../src/js_native_api_v8.h:42:27: note: overridden virtual function is here virtual v8::Maybe<bool> mark_arraybuffer_as_untransferable( PR-URL: #30549 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: David Carlier <devnexen@gmail.com>

PR-URL: #31757 Reviewed-By: Geoffrey Booth <webmaster@geoffreybooth.com> Reviewed-By: Jan Krems <jan.krems@gmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com>

Notable changes: Node.js 12.16.0 included large update to the ESM implementation in the 12.x release stream. One of the new features, Self Referential Modules, accidentally was released not behind the `--experimental-modules` flag. This release is being made specifically to appropraitely flag the feature which is not yet ready to be release on LTS. PR-URL: #31781

nodejs-github-bot · 2020-02-13T23:12:57Z

CI: https://ci.nodejs.org/job/node-test-pull-request/29117/
CITGM: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-smoker/2264/

doc/changelogs/CHANGELOG_V12.md

MylesBorins · 2020-02-13T23:14:16Z

I've kicked off CI + CITGM. I might push this before CITGM finishes, depending on how long it takes as the changes in this release should have 0 ecosystem. breakage that isn't expected / desired (only moves a feature behind a flag).

If anyone knows of other 12.x regressions I'd be happy to bring them in here.

doc/changelogs/CHANGELOG_V12.md

richardlau · 2020-02-13T23:16:04Z

If anyone knows of other 12.x regressions I'd be happy to bring them in here.

There were a couple of other regressions introduced in 12.16.0 too:

Assertion failed in 12.16.0 #31752, which @addaleax is looking at but perhaps we could revert 65e5a8a?
unable to build master, linking fails #31249 (comment) which is due to src: make --use-largepages a runtime option #30954 landing in 12.16.0. src: use __executable_start for linux hugepages #31547 should fix the regression in building but it hasn't been in a current release yet.

MylesBorins · 2020-02-13T23:33:18Z

@richardlau PTAL #31782

If those get signed off I'll roll them in and hopefully get this release out before EOD

MylesBorins · 2020-02-14T02:21:55Z

Taking a bit of time to get the test suite done for the linux containered env. Might have to punt this release to tomorrow. Any concerns?

Notable changes: Node.js 12.16.0 included 3 regressions that are being fixed in this release Accidental Unflagging of Self Resolving Modules: 12.16.0 included a large update to the ESM implementation. One of the new features, Self Referential Modules, was accidentally released without requiring the `--experimental-modules` flag. This release is being made to appropriately flag the feature. Isolate Disposal Order Change Introduced WASM Assertion: A change in the order of Isolate Disposal created an assertion error in WASM usage in V8. This was not present on 13.x or higher as they use a newer version of V8. The change was reverted. A regression test and fix are being worked on and will likely be included in a future 12.x release Use Largepages Runtime Option Introduced Linking Failure: A Semver-Minor change to introduce `--use-largepages` as a runtime option introduced a linking failure. This had been fixed in master but regressed as the fix has not yet gone out in a Current release. The feature has been reverted, but will be able to re-land with a fix in a future Semver-Minor release. Async Hooks was Causing an Exception When Handling Errors: Changes in async hooks internals introduced a case where an internal api call could be called with undefined causing a process to crash. The change to async hooks was reverted. A regression test and fix has been proposed and the change could re land in a future Semver-Patch release if the regression is reliably fixed. PR-URL: #31781

Notable changes: Node.js 12.16.0 included 6 regressions that are being fixed in this release **Accidental Unflagging of Self Resolving Modules**: 12.16.0 included a large update to the ESM implementation. One of the new features, Self Referential Modules, was accidentally released without requiring the `--experimental-modules` flag. This release is being made to appropriately flag the feature. **Process Cleanup Changed Introduced WASM-Related Assertion**: A change during Node.js process cleanup led to a crash in combination with specific usage of WASM. This has been fixed by partially reverted said change. A regression test and a full fix are being worked on and will likely be included in future 12.x and 13.x releases. **Use Largepages Runtime Option Introduced Linking Failure**: A Semver-Minor change to introduce `--use-largepages` as a runtime option introduced a linking failure. This had been fixed in master but regressed as the fix has not yet gone out in a Current release. The feature has been reverted, but will be able to reland with a fix in a future Semver-Minor release. **Async Hooks was Causing an Exception When Handling Errors**: Changes in async hooks internals introduced a case where an internal api call could be called with undefined causing a process to crash. The change to async hooks was reverted. A regression test and fix has been proposed and the change could re land in a future Semver-Patch release if the regression is reliably fixed. **New Enumerable Read-Only Property on EventEmitter breaks @types/extend** A new property for enumerating events was added to the EventEmitter class. This broke existing code that was using the `@types/extend` module for extending classses as `@types/extend` was attemping to write over the existing field which the new change made read-only. As this is the first property on EventEmitter that is read-only this feature could be considered Semver-Major. The new feature has been reverted but could re land in a future Semver-Minor release if a non breaking way of applying it is found. **Exceptions in the HTTP parser were not emitting an uncaughtException** A refactoring to Node.js interanls resulted in a bug where errors in the HTTP parser were not being emitted by `process.on('uncaughtException')`. The fix to this bug has been included in this release. PR-URL: #31781

MylesBorins · 2020-02-18T02:14:56Z

Hey all. I've done another pass on this. There are 4 changes that have been reverted and 2 that have had patches landed to fix the bugs that were introduced. I did my best to document what happened in the notable changes section as well as how these changes can be re-landed.

We can still make other changes to this before we push it out tomorrow, but I could really use support here as I have limited time to actually do the release.

Apologies in advance for the pace of these reversions and how this release was handled, doing my best to handle in a timely fashion while traveling and being off (today is a vacation day for US).

As mentioned above a broader post-mortem here would be very useful including discussion on how we handle regressions. We should likely schedule this for the next release WG meeting

nodejs-github-bot · 2020-02-18T02:16:38Z

CI: https://ci.nodejs.org/job/node-test-pull-request/29190/
CITGM: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-smoker/2274/
rc.2: https://nodejs.org/download/rc/v12.16.1-rc.2

doc/changelogs/CHANGELOG_V12.md

addaleax · 2020-02-18T02:45:15Z

Fwiw, I’ve opened an issue around how we handle regressions in LTS releases in the future: nodejs/Release#535

I also agree that it makes sense to try to put together a post-mortem for the regressions introduced here once this release is out.

Notable changes: Node.js 12.16.0 included 6 regressions that are being fixed in this release Accidental Unflagging of Self Resolving Modules: 12.16.0 included a large update to the ESM implementation. One of the new features, Self Referential Modules, was accidentally released without requiring the `--experimental-modules` flag. This release is being made to appropriately flag the feature. Process Cleanup Changed Introduced WASM-Related Assertion: A change during Node.js process cleanup led to a crash in combination with specific usage of WASM. This has been fixed by partially reverted said change. A regression test and a full fix are being worked on and will likely be included in future 12.x and 13.x releases. Use Largepages Runtime Option Introduced Linking Failure: A Semver-Minor change to introduce `--use-largepages` as a runtime option introduced a linking failure. This had been fixed in master but regressed as the fix has not yet gone out in a Current release. The feature has been reverted, but will be able to reland with a fix in a future Semver-Minor release. Async Hooks was Causing an Exception When Handling Errors: Changes in async hooks internals introduced a case where an internal api call could be called with undefined causing a process to crash. The change to async hooks was reverted. A regression test and fix has been proposed and the change could re-land in a future Semver-Patch release if the regression is reliably fixed. New Enumerable Read-Only Property on EventEmitter breaks @types/extend: A new property for enumerating events was added to the EventEmitter class. This broke existing code that was using the `@types/extend` module for extending classses as `@types/extend` was attemping to write over the existing field which the new change made read-only. As this is the first property on EventEmitter that is read-only this feature could be considered Semver-Major. The new feature has been reverted but could re-land in a future Semver-Minor release if a non breaking way of applying it is found. Exceptions in the HTTP parser were not emitting an uncaughtException: A refactoring to Node.js interanls resulted in a bug where errors in the HTTP parser were not being emitted by process.on('uncaughtException') when the `async_hooks` `after` hook exists. The fix to this bug has been included in this release. PR-URL: #31781

nodejs-github-bot · 2020-02-18T16:06:02Z

CI: https://ci.nodejs.org/job/node-test-pull-request/29210/
rerun linux: https://ci.nodejs.org/job/node-test-commit-linux/32938/

PR-URL: #31781

Notable changes: Node.js 12.16.0 included 6 regressions that are being fixed in this release **Accidental Unflagging of Self Resolving Modules**: 12.16.0 included a large update to the ESM implementation. One of the new features, Self Referential Modules, was accidentally released without requiring the `--experimental-modules` flag. This release is being made to appropriately flag the feature. **Process Cleanup Changed Introduced WASM-Related Assertion**: A change during Node.js process cleanup led to a crash in combination with specific usage of WASM. This has been fixed by partially reverted said change. A regression test and a full fix are being worked on and will likely be included in future 12.x and 13.x releases. **Use Largepages Runtime Option Introduced Linking Failure**: A Semver-Minor change to introduce `--use-largepages` as a runtime option introduced a linking failure. This had been fixed in master but regressed as the fix has not yet gone out in a Current release. The feature has been reverted, but will be able to reland with a fix in a future Semver-Minor release. **Async Hooks was Causing an Exception When Handling Errors**: Changes in async hooks internals introduced a case where an internal api call could be called with undefined causing a process to crash. The change to async hooks was reverted. A regression test and fix has been proposed and the change could re land in a future Semver-Patch release if the regression is reliably fixed. **New Enumerable Read-Only Property on EventEmitter breaks @types/extend** A new property for enumerating events was added to the EventEmitter class. This broke existing code that was using the `@types/extend` module for extending classses as `@types/extend` was attemping to write over the existing field which the new change made read-only. As this is the first property on EventEmitter that is read-only this feature could be considered Semver-Major. The new feature has been reverted but could re land in a future Semver-Minor release if a non breaking way of applying it is found. **Exceptions in the HTTP parser were not emitting an uncaughtException** A refactoring to Node.js interanls resulted in a bug where errors in the HTTP parser were not being emitted by `process.on('uncaughtException')`. The fix to this bug has been included in this release. PR-URL: #31781

Refs: nodejs/node#31781

MylesBorins · 2020-02-18T22:48:41Z

landed in d3fb168

cjihrig and others added 2 commits February 13, 2020 08:42

module: 12.x self resolve flag as experimental modules

f0b2d87

PR-URL: #31757 Reviewed-By: Geoffrey Booth <webmaster@geoffreybooth.com> Reviewed-By: Jan Krems <jan.krems@gmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com>

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package self-reference works without a flag in node v12.16 #31754

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blog: add release post for 12.16.1 nodejs/nodejs.org#2963

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blog: add release post for 12.16.1 (#2963)

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v12.16.2 proposal #32313

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v12.16.1 proposal #31781

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v12.16.1 proposal #31781

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2020-02-18, Version 12.16.1 'Erbium' (LTS), @MylesBorins

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