This is probably our fastest time in-between full releases, especially given all of the excellent work that has made it in. A few highlights are updated compatibility with the latest WASI work from the Bytecode Alliance, faster speed and PIO support for the RP2350, and a new garbage collector option for Linux. Plus a bunch of critical fixes to make your life better!

• general
  • add the Boehm-Demers-Weiser GC on Linux
• ci
  • add more tests for wasm and baremetal
• compiler
  • crypto/internal/sysrand is allowed to use unsafe signatures
• examples
  • add goroutine benchmark to examples
• fixes
  • ensure use of pointers for SPI interface on atsam21/atsam51 and other machines/boards that were missing implementation (#4798)
  • replace loop counter with hw timer for USB SetAddressReq on rp2040 (#4796)
• internal
  • update to go.bytecodealliance.org@v0.6.2 in GNUmakefile and internal/wasm-tools
  • exclude certain files when copying package in internal/cm
  • update to go.bytecodealliance.org/cm@v0.2.2 in internal/cm
  • remove old reflect.go in internal/reflectlite
• loader
  • use build tags for package iter and iter methods on reflect.Value in loader, iter, reflect
  • add shim for go1.22 and earlier in loader, iter
• machine
  • bump rp2040 to 200MHz (#4768)
  • correct register address for Pin.SetInterrupt for rp2350 (#4782)
  • don't block the rp2xxx UART interrupt handler
  • fix RP2040 Pico board on the playground
  • add flash support for rp2350 (#4803)
• os
  • add stub Symlink for wasm
• refactor
  • use *SPI everywhere to make consistent for implementations. Fixes#4663 "in reverse" by making SPI a pointer everywhere, as discussed in the comments.
• reflect
  • add Value.SetIter{Key,Value} and MapIter.Reset in reflect, internal/reflectlite
  • embed reflectlite types into reflect types in reflect, internal/reflectlite
  • add Go 1.24 iter.Seq[2] methods
  • copy reflect iter tests from upstream Go
  • panic on Type.CanSeq[2] instead of returning false
  • remove strconv.go
  • remove unused go:linkname functions
• riscv-qemu
  • add VirtIO RNG device
  • increase stack size
• runtime
  • only allocate heap memory when needed
  • remove unused file func.go
  • use package reflectlite
• transform
  • cherry-pick from#4774