What were the notable Go updates?

gopls/internal/cmd: remove 'gopls bug' subcommand, gopls/internal/filewatcher: remove unused interval field, and go/ssa: reject generic methods from RuntimeTypes.

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The Wire · Showcase

GOPLS SHEDS DEAD CODE, SIMD BRIDGE BREAKS GO BUILD

By RepoJournal · Filed 06:01 UTC on June 9, 2026 · About Go

gopls removed an unused subcommand and cleaned house across internal APIs, but a missing logic gate in cmd/go is crashing simple SIMD programs.

The tools team shipped cleanup across gopls: the 'gopls bug' subcommand is gone [1], replaced by a test harness in 'gopls execute', and an unused interval field got pruned from the filewatcher [2]. These are hygiene wins that ship with zero friction. More urgent: generic methods in go/ssa were leaking into RuntimeTypes and breaking analysis tools, now fixed [3]. A diagnostics reporting bug in gopls' MCP mode was misattributing errors when processing multiple files [4], and duplicate function declarations were triggering internal errors in stub method generation [5]. Across the stack, the net package fixed HTTP/2 Content-Length header validation per RFC 9112 [6] and corrected SVCB record parameter ordering in DNS messages [9]. HTTP/3 now supports gzip like HTTP/1 and HTTP/2 [8]. But the real blocker: SIMD bridge packages are missing from cmd/go's test import logic, causing panics on vanilla 'go run' with simd/archsimd imports [7]. That's a showstopper for anyone trying the new SIMD APIs.

Action items

→ If using SIMD: don't deploy until cmd/go fix lands golang/go [immediate]
→ Apply generic method SSA fix before next analysis tool release golang/tools [plan]
→ Monitor gopls MCP diagnostics in production if using multi-file analysis golang/tools [monitor]

References

[1] gopls/internal/cmd: remove 'gopls bug' subcommand golang/tools
[2] gopls/internal/filewatcher: remove unused interval field golang/tools
[3] go/ssa: reject generic methods from RuntimeTypes golang/tools
[4] gopls/internal/mcp: fix reporting in go_diagnostics tool golang/tools
[5] gopls/internal/golang/stubmethods: fix internal error (missing type) golang/tools
[6] net/http/internal/http2: reject non-identical duplicate Content-Length headers golang/go
[7] cmd/go: include simd bridge package in compiled test imports golang/go
[8] internal/http3: add gzip support to transport golang/net
[9] dns/dnsmessage: correctly validate SVCB record parameter order golang/net

Quick answers

What shipped in Go on June 9, 2026?: gopls removed an unused subcommand and cleaned house across internal APIs, but a missing logic gate in cmd/go is crashing simple SIMD programs. In total, 17 commits landed.
What were the notable Go updates?: gopls/internal/cmd: remove 'gopls bug' subcommand, gopls/internal/filewatcher: remove unused interval field, and go/ssa: reject generic methods from RuntimeTypes.

PRINTF ANALYZER GETS SMARTER, PLAYGROUND NEEDS GO 1.26

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go 13 shipped 1-min read

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GO REWORKS HTTP/3 REGISTRATION, KILLS GLOBAL STATE IN MODULE LOADER

Damien Neil's paired changes to net/http and x/net/http3 fundamentally reshape how HTTP/3 integrates with the standard library, while Michael Matloob strips out state manipulation functions that no longer belong anywhere.

go 28 shipped 1-min read

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GOPLS FIXES COMMENT HANDLING IN COMPOSITE LITERALS, VULNDB ADDS 46 SECURITY REPORTS

A critical gopls bug that corrupted code when comments appeared in composite literals is fixed, while the vulnerability database absorbs a major batch of 46 new security reports across the ecosystem.

go 21 shipped 2-min read

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COMPILER SHRINKS CODE SIZE WHILE QUIC FIXES BUSY-LOOP HANGS

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go 25 shipped 1-min read

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