Issues

• il2al: host function rules become two independent conditionals and ignore the new store s'

  WebAssembly/spec#2279 · Filter by author tamaroning opened on Oct 14, 2026
  6

• Spec interpreter/implementation discrepancy - a local with an invalid type and 0 count

  WebAssembly/spec#2258 · Filter by author alexcrichton opened on Oct 2, 2026
  4

• [js-api] A mutable global import allocates a const global before LinkError

  WebAssembly/spec#2253 · Filter by author chicoxyzzy opened on Sep 28, 2026

• [spectec] Wasm 1.0: $instantiate missing premises

  WebAssembly/spec#2245 · Filter by author lzy0505 opened on Sep 4, 2026

• Incorrect implementations of unreachable ref.as_non_null validation

  WebAssembly/spec#2235 · Filter by author tlively opened on Aug 28, 2026
  9

• [spectec] Missing and wrong side conditions in the middle-end

  WebAssembly/spec#2196 · Filter by author zilinc opened on Jun 23, 2026

• Structured cloning of WebAssembly.Memory is not defined

  WebAssembly/spec#2155 · Filter by author annevk opened on May 4, 2026
  2

• Double rounding fix is (still) wrong in Windows

  WebAssembly/spec#2150 · Filter by author lifthrasiir opened on Apr 23, 2026
  1

• Simplify JS-API test syncing

  WebAssembly/spec#2130 · Filter by author eqrion opened on Mar 31, 2026
  5

• [js-api] Ambiguity in WebAssembly.instance() importObject requirement with JS builtins imports

  WebAssembly/spec#2102 · Filter by author SamVerschueren opened on Mar 9, 2026
  1

• Should importing or exporting a function count as declaring it for ref.func?

  WebAssembly/spec#2072 · Filter by author eqrion opened on Feb 4, 2026
  17

• Some links in the archived version of the W3C/bikeshed version of the Wasm spec are broken

  WebAssembly/spec#2051 · Filter by author wucke13 opened on Jan 12, 2026
  1

• Minor errors in 3.0 binary format

  WebAssembly/spec#2041 · Filter by author conrad-watt opened on Dec 8, 2025
  1

• [js-api] Is the exception propagation model used consistently?

  WebAssembly/spec#2040 · Filter by author ShinWonho opened on Dec 4, 2025

• [spec] Missing hyperlink for .refs in table.set reduction rule prose

  WebAssembly/spec#2039 · Filter by author alessiofaieta opened on Dec 3, 2025
  

• [js-api] Ambiguity in WebAssembly.instantiate(bytes) if WebAssembly.Module is a thenable

  WebAssembly/spec#2034 · Filter by author backes opened on Nov 26, 2025
  3

• [js-api] Possible alignment of abstract closure conventions with ECMA-262

  WebAssembly/spec#2027 · Filter by author ShinWonho opened on Nov 6, 2025
  2

• Inconsistencies across multiple pages of instruction lists

  WebAssembly/spec#2020 · Filter by author tadd opened on Oct 25, 2025
  3

• Update bib references/citation for WASM 3.0

  WebAssembly/spec#2018 · Filter by author Irvise opened on Oct 22, 2025
  1

• gc-exotic-objects [[PreventExtensions]] should return true.

  WebAssembly/spec#2008 · Filter by author mhofman opened on Oct 9, 2025
  10

• [js-api] Unclear spec for -0 in ToWebAssemblyValue?

  WebAssembly/spec#1984 · Filter by author Liedtke opened on Sep 23, 2025
  9

• [js-api] Are Wasm-gc abstract heap types included in the JS API of e.g. WebAssembly.Global?

  WebAssembly/spec#1980 · Filter by author Liedtke opened on Sep 22, 2025
  10

• The reference interpreter became up to 20 times slower after a87fffc

  WebAssembly/spec#1979 · Filter by author bashor opened on Sep 20, 2025
  1

• [js-api] Informal description about "the index of the host function"

  WebAssembly/spec#1959 · Filter by author ShinWonho opened on Aug 18, 2025
  4

• [js-api] Exposing Wasm-specific internal structure

  WebAssembly/spec#1958 · Filter by author ShinWonho opened on Aug 18, 2025
  2