Issues

• Guest debugging: breakpoint editing panics, leaks a breakpoint, or segfaults

  wasmtime:debugging
  bytecodealliance/wasmtime#15284 · Filter by author alexcrichton opened on Nov 13, 2026

• Guest debugging: FrameHandle::is_valid stays true after a trap or a component host call returns

  bugwasmtime:debugging
  bytecodealliance/wasmtime#15281 · Filter by author alexcrichton opened on Nov 13, 2026

• Cranelift s390x: stack_limit load chain with a large offset panics

  bugcranelift:area:s390xcranelift
  bytecodealliance/wasmtime#15280 · Filter by author alexcrichton opened on Nov 13, 2026

• Cranelift x64: sadd_sat.i32x4 with a loaded operand panics

  bugcranelift:area:x64cranelift
  bytecodealliance/wasmtime#15279 · Filter by author alexcrichton opened on Nov 13, 2026

• Cranelift: inlining interrupt_poll into a non-tail caller fails verification

  bugcranelift
  bytecodealliance/wasmtime#15278 · Filter by author alexcrichton opened on Nov 13, 2026

• Cranelift: "pushed stack maps out of order" panic with a call followed by interrupt_poll

  bugcranelift
  bytecodealliance/wasmtime#15277 · Filter by author alexcrichton opened on Nov 13, 2026

• Cranelift: egraph: performance: finding the loop to hoist a value out of makes compile time quadratic in the number of loops in a row

  bugcranelift:goal:compile-timecranelift
  bytecodealliance/wasmtime#15266 · Filter by author kestred opened on Nov 13, 2026

• Cranelift: egraph: performance: elaborating a running sum makes compile time at least quadratic in the number of calls

  bugcranelift:goal:compile-timecranelift
  bytecodealliance/wasmtime#15264 · Filter by author kestred opened on Nov 13, 2026

• Cranelift: egraph: performance: finding a value's GVN depth makes compile time quadratic in the dominator tree's depth

  bugcranelift:goal:compile-timecranelift
  bytecodealliance/wasmtime#15263 · Filter by author kestred opened on Nov 13, 2026

• Cranelift: aarch64: floats live across a call are spilled even when the function holds no vector

  bugcranelift:area:aarch64cranelift
  bytecodealliance/wasmtime#15262 · Filter by author kestred opened on Nov 13, 2026

• Cranelift: missing support for vector constants

  bytecodealliance/wasmtime#15260 · Filter by author myunbin opened on Nov 13, 2026

• Core dump of a trapping global initializer hits a debug assertion on non-nullable reference globals

  wasm-proposal:gc
  bytecodealliance/wasmtime#15256 · Filter by author alexcrichton opened on Nov 12, 2026

• Provide never-throws metadata for more functions during Wasm-to-CLIF translation

  cranelift:goal:optimize-speedperformance
  bytecodealliance/wasmtime#15234 · Filter by author fitzgen opened on Nov 11, 2026
  1

• Windows ARM64: compiling a function larger than 1 MiB panics with "function too large"

  bugcranelift:area:aarch64
  bytecodealliance/wasmtime#15233 · Filter by author alexcrichton opened on Nov 11, 2026
  1

• Performance regression in 4182ebadb18e..5619a5dab7b1 (are-we-fast-yet run 00092)

  awfyperformance
  bytecodealliance/wasmtime#15210 · Filter by author ba-are-we-fast-yet opened on Nov 9, 2026
  2

• Cache worker lowers the priority of the whole process on macOS

  bytecodealliance/wasmtime#15160 · Filter by author rikbrown opened on Nov 5, 2026
  1

• Use deferred tasks without cfg(feature = "component-model-async")?

  performancewasm-proposal:component-model
  bytecodealliance/wasmtime#15151 · Filter by author fitzgen opened on Nov 4, 2026
  1

• Wasmtime: separate Pool out of Engine

  bytecodealliance/wasmtime#15140 · Filter by author pchickey opened on Nov 4, 2026
  2

• wasmtime::ResourcesRequired should include more fields

  bytecodealliance/wasmtime#15139 · Filter by author pchickey opened on Nov 4, 2026
  

• NopHasher makes every hit in the subtype-check cache cost ~70 ns

  performancewasm-proposal:gc
  bytecodealliance/wasmtime#15133 · Filter by author justinfagnani opened on Nov 3, 2026
  4

• Resolve builtins transitively

  bytecodealliance/wasmtime#15086 · Filter by author dyslexicsteak opened on Oct 30, 2026

• Do not copy GC objects when the caller passes an immutable object and the callee lowers it into an immutable object

  wasm-proposal:component-modelwasm-proposal:gc
  bytecodealliance/wasmtime#15081 · Filter by author fitzgen opened on Oct 29, 2026

• Support component-model-async in the component-model and GC implementation

  wasm-proposal:component-modelwasm-proposal:gc
  bytecodealliance/wasmtime#15080 · Filter by author fitzgen opened on Oct 29, 2026

• Cranelift: Can't distinguish between i64 and i64x1 despite being ABI relevant on arm64

  bugcranelift
  bytecodealliance/wasmtime#15057 · Filter by author bjorn3 opened on Oct 29, 2026

• wasi-http: Guest provided trailers can be lost

  bugwasi-http
  bytecodealliance/wasmtime#15026 · Filter by author adamrk opened on Oct 27, 2026
  1