Who contributed to Go on September 30, 2026?

9 developers shipped this update, including David Chase, Peter Weinberger, Joe Tsai, qmuntal, AkariH, Hongxiang Jiang, Junyang Shao, and Cuong Manh Le, and 1 more.

Sep 30, 2026

$ the-wire · showcase

Windows thread stack corruption fix, json v1 field restored in Go 1.27 shim

Q: What were the notable Go updates?

runtime: create Windows threads on the system stack, encoding/json: fix UnsupportedValueError.Value regression, and types2, go/types: fix data race in Unalias on alias instances.

By RepoJournal · Filed 06:56 UTC on September 30, 2026 · About Go · Composed from the cited sources · methodology

9 people shipped this

Peter Weinberger @pjweinbgo 2 cited

Joe Tsai @dsnet 1 cited

qmuntal @qmuntal 1 cited

Junyang Shao @JunyangShao 1 cited

David Chase @dr2chase

AkariH @AkariH

Hongxiang Jiang @h9jiang

Cuong Manh Le @cuonglm

Hana Kim @hyangah

Two Go fixes land on real defects: thread creation on Windows can overrun a goroutine stack, and encoding/json's v1 compatibility shim stopped populating UnsupportedValueError.Value when v1 moved onto v2.

runtime: create Windows threads on the system stack golang/go

by qmuntal

newosproc stopped switching to the system stack when the runtime moved from stdcall to createThread, so a LockOSThread call reaching it on a goroutine stack could let native CreateThread overrun the stack and corrupt adjacent memory. createThread now runs on the system stack, retry loop included.

encoding/json: fix UnsupportedValueError.Value regression golang/go

by Joe Tsai

With v1 implemented on top of v2 in Go 1.27, UnsupportedValueError.Value was left unpopulated, and code in the wild reads that field. The compatibility shim populates it again.

types2, go/types: fix data race in Unalias on alias instances golang/go

by Peter Weinberger

Alias instances created via types.Instantiate outside package checking get a nil *Checker, so Alias.actual stayed nil and Unalias memoized it without synchronization when callers touched the instance from multiple goroutines. The race is fixed in types2 and go/types.

go/analysis/passes/modernize: avoid invalid SuggestedFixes golang/tools

by Peter Weinberger

While editing, malformed struct literals can leave brace positions missing or out of order, and the modernize analyzer's embedlitUnnest could then emit TextEdit ranges past EOF, tripping driverutil.ValidateFixes into filing bug reports. It now validates brace positions and deletion ranges before suggesting a fix.

cmd/influx: upgrade OS packages in Dockerfile golang/build

by Junyang Shao

The influxdb2 base image has not been refreshed since December 2024 and ships outdated Debian 12 packages including openssl (CVE-2025-15467); the image build now runs apt-get upgrade. Also in this batch: archsimd drops its mandatory panic for SVE vector lengths above 32, and gopls adds a release note for generic interface support plus follow-up questions that ask for type arguments.