Issues

• wasm (asyncify): every goroutine and every JS callback allocates a new stack that is rarely freed; reusing finished stacks cut allocation per request 45x

  tinygo-org/tinygo#5801 · Filter by author joeblew999 opened on Oct 1, 2026

• wasm: finalizer-pressure GC at every scheduler idle makes syscall/js programs 4-6x slower (finalizerGCThreshold = 32)

  tinygo-org/tinygo#5800 · Filter by author joeblew999 opened on Oct 1, 2026

• net/http: ServeMux does not match method patterns ("GET /path" is 404)

  tinygo-org/tinygo#5799 · Filter by author joeblew999 opened on Oct 1, 2026

• wasm: Go timers stall on Cloudflare Workers (runtime.sleepTicks passes fractional milliseconds to setTimeout)

  tinygo-org/tinygo#5798 · Filter by author joeblew999 opened on Oct 1, 2026

• runtime.wasiOnIdle missing — async component glue fails to link (undefined symbol: runtime.wasiOnIdle)

  tinygo-org/tinygo#5796 · Filter by author gqf2008 opened on Sep 30, 2026

• runtime: SetFinalizer does nothing with -gc=boehm, so syscall/js values leak

  tinygo-org/tinygo#5788 · Filter by author neomantra opened on Sep 29, 2026
  1

• go test caching does not track .ll fixtures loaded through go-llvm

  tinygo-org/tinygo#5780 · Filter by author davecheney opened on Sep 28, 2026
  

• transform: promoted heap allocations do not share stack slots

  tinygo-org/tinygo#5778 · Filter by author neomantra opened on Sep 28, 2026
  1

• Nintendo DS target support

  tinygo-org/tinygo#5777 · Filter by author TanZng opened on Sep 28, 2026

• Add -tags llvm23

  tinygo-org/tinygo#5775 · Filter by author davecheney opened on Sep 28, 2026
  6

  

• runtime: a single allocation near 1GB fails on 64-bit unix regardless of free memory

  tinygo-org/tinygo#5760 · Filter by author 0pcom opened on Sep 26, 2026

• runtime: signals are not delivered under the threads scheduler when the program blocks on I/O

  tinygo-org/tinygo#5758 · Filter by author 0pcom opened on Sep 26, 2026

• interp: ordered icmp on a pointer operand drops the whole package init to runtime

  tinygo-org/tinygo#5748 · Filter by author deadprogram opened on Sep 25, 2026

• reflect.SliceOf unimplemented: encoding/json (jsonv2, default in Go 1.27) panics when marshaling maps with non-string keys

  tinygo-org/tinygo#5740 · Filter by author yuta-yoshinaga opened on Sep 24, 2026
  1

• compiler: WASM DWARF misses ~40% of code bytes with opts=1

  bugcore
  tinygo-org/tinygo#5736 · Filter by author soypat opened on Sep 24, 2026
  3

• stm32wlex: ADC_CHSELR0_CHSELx constants off by 1

  stm32
  tinygo-org/tinygo#5712 · Filter by author bemasher opened on Sep 19, 2026
  1

• -scheduler=none wasip1 build fails: time.goFunc kept live in whole-program graph (regression vs 0.41-era builds)

  bugwasm
  tinygo-org/tinygo#5705 · Filter by author Andrei-cloud opened on Sep 18, 2026
  3

• crypto/tls: hosted TLS handshake returns success without negotiating TLS

  tinygo-org/tinygo#5696 · Filter by author yohimik opened on Sep 17, 2026

• os/exec: commands cannot start with standard file descriptors on Linux and Darwin

  tinygo-org/tinygo#5695 · Filter by author yohimik opened on Sep 17, 2026

• darwin: minimal SDK lacks socket and process link symbols

  tinygo-org/tinygo#5694 · Filter by author yohimik opened on Sep 17, 2026

• runtime: weak.Pointer.Value fails to link

  next-release
  tinygo-org/tinygo#5693 · Filter by author yohimik opened on Sep 17, 2026
  1

• sync: RWMutex can deadlock when readers queue behind a writer

  next-release
  tinygo-org/tinygo#5692 · Filter by author yohimik opened on Sep 17, 2026
  3

• hash/maphash fails to compile with Go 1.27: undefined: abi.MapType

  tinygo-org/tinygo#5684 · Filter by author joeblew999 opened on Sep 15, 2026
  2

• Standard library tests that move large amounts of data are very slow

  slowstdlib
  tinygo-org/tinygo#5659 · Filter by author deadprogram opened on Sep 10, 2026
  2

• tinygo compiler pains: memory use and slowness

  coreslow
  tinygo-org/tinygo#5657 · Filter by author soypat opened on Sep 7, 2026
  3