go, branch go1.26rc1

[release-branch.go1.26] go1.26rc1

2025-12-16T20:00:53Z

Change-Id: I28020794bf3595d31b0e64b692492a8ac951202a Reviewed-on: https://go-review.googlesource.com/c/go/+/730501 Auto-Submit: Gopher Robot Reviewed-by: Michael Knyszek Reviewed-by: David Chase TryBot-Bypass: Gopher Robot

[release-branch.go1.26] all: merge master (d14b642) into release-branch.go1.26

2025-12-15T21:42:50Z

Merge List: + 2025-12-15 d14b6427cf cmd/link: set canUsePlugins only on platforms that support plugin + 2025-12-15 9ba0948172 cmd/link: don't create __x86.get_pc_thunk symbol if it already exists + 2025-12-15 b7944a5f80 text/template: fix slice builtin for pointers to arrays + 2025-12-15 6713f46426 archive/tar, compress/bzip2: base64 some troublesome testdata files + 2025-12-15 388eb10f50 cmd/go: show comparable in go doc interface output + 2025-12-13 1b291b70df simd/archsimd: skip tests if AVX is not available + 2025-12-12 d30884ba1f cmd/dist: test GOEXPERIMENT=simd on AMD64 + 2025-12-12 ee0275d15b runtime, cmd/link: tighten search for stackObjectRecord + 2025-12-12 63fced531c runtime/secret: restore goroutine behavior to proposal + 2025-12-12 6455afbc6f runtime: dropg after emitting trace event in preemptPark + 2025-12-12 8f45611e78 runtime/pprof: deflake TestGoroutineLeakProfileConcurrency + 2025-12-12 34af879dde cmd/link: add new linknames to blocked linkname list + 2025-12-12 8d31244562 runtime/secret: guard files with goexperiment + 2025-12-12 e8a83788a4 go/doc: reuse import name logic for examples + 2025-12-11 927c89bbc5 cmd/compile: update ABI document for riscv64 + 2025-12-11 245bcdd478 runtime: add extra subtest layer to TestFinalizerOrCleanupDeadlock + 2025-12-11 ae62a1bd36 Revert "database/sql: allow drivers to override Scan behavior" + 2025-12-11 89614ad264 runtime/trace: fix broken TestSubscribers + 2025-12-11 bb2337f24c cmd/go: set GOOS in vet_asm test + 2025-12-11 2622d2955b go/types, types2: remove indirection of Named.finite + 2025-12-11 5818c9d714 encoding/json/jsontext: add symbolic Kind constants + 2025-12-11 9de6468701 json/jsontext: normalize all invalid Kinds to 0 + 2025-12-11 00642ee23b encoding/json: report true from v2 Decoder.More when an error is pending + 2025-12-11 7b60d06739 lib/time: update to 2025c/2025c + 2025-12-11 1de9585be2 runtime: prevent calls to GOMAXPROCS while clearing P trace state + 2025-12-11 e38c38f0e5 internal/trace: correctly handle GoUndetermined for GoroutineSummary + 2025-12-11 c0ba519764 simd/archsimd: rename Mask.AsIntMxN to Mask.ToIntMxN + 2025-12-11 f110ba540c simd/archsimd: define ToMask only on integer vectors + 2025-12-11 1da0c29c2a simd/archsimd: add package doc + 2025-12-11 f105dfd048 lib/fips140: freeze v1.1.0-rc1 FIPS 140 module zip file + 2025-12-11 af14f67911 runtime: make goroutines inherit DIT state, don't lock to OS thread + 2025-12-11 72c83bcc80 go/types, types2: put Named.finite behind Named.mu + 2025-12-10 b2a697bd06 all: update to x/crypto@7dacc380ba00 + 2025-12-10 fc66a5655b crypto: clean up subprocess-spawning tests + 2025-12-10 b130dab792 crypto/hpke: apply fips140.WithoutEnforcement to ML-KEM+X25519 hybrid + 2025-12-10 c39fe18fea crypto/mlkem/mlkemtest: error out in fips140=only mode + 2025-12-10 db0ab834d6 crypto/hpke: don't corrupt enc's excess capacity in DHKEM decap + 2025-12-10 cd873cf7e9 crypto/internal/fips140/aes/gcm: don't panic on bad nonces out of FIPS 140-3 mode + 2025-12-10 550c0c898b crypto/hpke: use new gcm.NewGCMForHPKE for FIPS 140-3 compliance + 2025-12-10 d349854de6 crypto/internal: ACVP test data migrated to Geomys repo + 2025-12-10 cd9319ff8e runtime: use correct function name in methodValueCallFrameObjs comment + 2025-12-10 0d71bd57c9 runtime: VZEROUPPER at the end of FilterNilAVX512 + 2025-12-09 36bca3166e cmd: fix some issues in the comments + 2025-12-09 b9693a2d9a runtime: on AIX check isarchive before calling libpreinit + 2025-12-09 1274d58dac go/types, types2: add check for finite size at value observance + 2025-12-08 9e09812308 all: REVERSE MERGE dev.simd (c456ab7) into master + 2025-12-08 c456ab7a30 [dev.simd] all: merge master (a33bbf1) into dev.simd + 2025-12-08 1d8711e126 [dev.simd] internal/buildcfg: don't enable SIMD experiment by default + 2025-12-08 a33bbf1988 weak: fix weak pointer test to correctly iterate over weak pointers after GC + 2025-12-08 a88a96330f cmd/cgo: use doc link for cgo.Handle + 2025-12-08 276cc4d3db cmd/link: fix AIX builds after recent linker changes + 2025-12-08 f38e968aba [dev.simd] cmd/compile: zero only low 128-bit of X15 + 2025-12-08 144cf17d2c [dev.simd] simd, cmd/compile: move "simd" to "simd/archsimd" + 2025-12-08 f2d96272cb runtime/trace: update TestSubscribers to dump traces + 2025-12-08 4837bcc92c internal/trace: skip tests for alloc/free experiment by default + 2025-12-08 b5f6816cea cmd/link: generate DWARF for moduledata + 2025-12-08 44a39c9dac runtime: only run TestNotInGoMetricCallback when building with cgo + 2025-12-08 3a6a034cd6 runtime: disable TestNotInGoMetricCallback on FreeBSD + race + 2025-12-08 4122d3e9ea runtime: use atomic C types with atomic C functions + 2025-12-08 34397865b1 runtime: deflake TestProfBufWakeup + 2025-12-08 3417b48b17 [dev.simd] simd: add carryless multiply + 2025-12-08 d4972f6295 runtime: mark getfp as nosplit + 2025-12-05 0d0d5c9a82 test/codegen: test negation with add/sub on riscv64 + 2025-12-05 2e509e61ef cmd/go: convert some more tests to script tests + 2025-12-05 c270e71835 cmd/go/internal/vet: skip -fix on pkgs from vendor or non-main mod + 2025-12-05 f51ee08905 [dev.simd] simd: replace checking loops with call to slice-checker + 2025-12-03 2b91d96941 [dev.simd] internal/buildcfg: turn GOEXPERIMENT=simd back on Change-Id: Iaf3a44bb5ada83b0f056032839f5dd0fcdb2294f

cmd/link: set canUsePlugins only on platforms that support plugin

2025-12-15T21:08:29Z

If a program imports the plugin package, but the plugin build mode is not supported on the platform, it still cannot use plugin. Don't treat it like so. Updates #76815. Change-Id: I0fd719427d7c3cc96a94ce1f92d6e4457da92a90 Reviewed-on: https://go-review.googlesource.com/c/go/+/730164 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI

cmd/link: don't create __x86.get_pc_thunk symbol if it already exists

2025-12-15T21:08:19Z

On 386, in some build modes we need to create the __x86.get_pc_thunk symbols, to support PC-relative addressing. In some situation the thunk symbols may already exist, e.g. loaded from a C object in internal linking mode. In this case, we should use the exiting symbol instead of making a new one. The current code updates the symbol content in place but also adds a duplicated entry to Textp, which breaks the address sorting order. Fixes #76815. Change-Id: Iab11106ce592dc5219b7a0e07cfafcd270661a2f Reviewed-on: https://go-review.googlesource.com/c/go/+/730161 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI

text/template: fix slice builtin for pointers to arrays

2025-12-15T17:04:58Z

The slice function now properly handles pointers to arrays by calling indirect() to dereference pointers, matching the behavior of the index function. Fixes #39596 Change-Id: Id4920edbfd8fd3df3a181b59a61733f88b0f104d Reviewed-on: https://go-review.googlesource.com/c/go/+/727400 LUCI-TryBot-Result: Go LUCI Reviewed-by: Sean Liao Reviewed-by: Rob Pike Reviewed-by: David Chase Reviewed-by: Michael Knyszek

archive/tar, compress/bzip2: base64 some troublesome testdata files

2025-12-15T16:34:13Z

This avoids complaints from scanners that look for and open tar and bz2 files, and complain if they look weird. In this case, they do look weird, because they are intentionally strange. This kind of thing shouldn't be necessary, but we already have the machinery to do it so it's easy enough. Fixes #76799 Change-Id: Ib302b3aef30108a1325f91fcb2d166f8e1863792 Reviewed-on: https://go-review.googlesource.com/c/go/+/729780 Reviewed-by: David Chase Auto-Submit: Ian Lance Taylor LUCI-TryBot-Result: Go LUCI Reviewed-by: Michael Knyszek Reviewed-by: Joseph Tsai

cmd/go: show comparable in go doc interface output

2025-12-15T15:32:10Z

The go doc command now displays the comparable constraint when embedded in an interface, matching the existing behavior for the error type. Previously, when an interface embedded comparable, it was not shown in the documentation and incorrectly triggered the "Has unexported methods" message even when no unexported methods existed. Fixes #76125 Change-Id: Idaae07fcb1dfc79b1fae374f9fc68df0052ff38e Reviewed-on: https://go-review.googlesource.com/c/go/+/727100 Reviewed-by: Sean Liao Reviewed-by: David Chase Reviewed-by: Michael Matloob Reviewed-by: Michael Matloob LUCI-TryBot-Result: Go LUCI

simd/archsimd: skip tests if AVX is not available

2025-12-13T15:51:12Z

The simd operations require AVX. If AVX is not available, skip the tests. Change-Id: I3c384ba07e1e6c2c198dfb27bc84a2e27f825680 Reviewed-on: https://go-review.googlesource.com/c/go/+/729820 LUCI-TryBot-Result: Go LUCI Reviewed-by: David Chase

cmd/dist: test GOEXPERIMENT=simd on AMD64

2025-12-13T01:25:36Z

Change-Id: Iaf8bb811cd8c674c801d8e068fcc753e889ac672 Reviewed-on: https://go-review.googlesource.com/c/go/+/729721 LUCI-TryBot-Result: Go LUCI Reviewed-by: David Chase

runtime, cmd/link: tighten search for stackObjectRecord

2025-12-12T21:23:17Z

A stackObjectRecord should always be in funcdata, between gofunc and the end of pclntab, except for the special case of methodValueCallFrameObjs, which should always be in noptrbss. Adjust the two loops that look for the moduledata corresponding to a stackObjectRecord to search more precisely, rather than relying on datap.end. Closely based on a patch by Michael Stapelberg. For #76038 Change-Id: I751801d8fd030af751825a67905b2a343280e7d9 Reviewed-on: https://go-review.googlesource.com/c/go/+/728840 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI Auto-Submit: Ian Lance Taylor Reviewed-by: Cherry Mui