Issues

• AlignmentLowering: an out-of-bounds unaligned store becomes a partial write

  WebAssembly/binaryen#9186 · Filter by author tamaroning opened on Oct 1, 2026

• AvoidReinterprets: i32.atomic.load under f32.reinterpret_i32 loses its atomicity

  WebAssembly/binaryen#9185 · Filter by author tamaroning opened on Oct 1, 2026

• LoopInvariantCodeMotion: struct.new is hoisted out of a loop, so all iterations share one object

  WebAssembly/binaryen#9184 · Filter by author tamaroning opened on Oct 1, 2026

• GlobalStructInference: struct.new in table initializers and element segments is ignored under --closed-world

  WebAssembly/binaryen#9183 · Filter by author tamaroning opened on Oct 1, 2026
  2

• EffectAnalyzer: code that may not return can be reordered with a trap or a call

  WebAssembly/binaryen#9182 · Filter by author tamaroning opened on Oct 1, 2026
  2

• OptimizeInstructions: select (memory.grow 1) (memory.grow 1) c is folded to one operand and returns the wrong result

  WebAssembly/binaryen#9181 · Filter by author tamaroning opened on Oct 1, 2026

• OptimizeInstructions: memory.fill with constant value and size 16 becomes two i64.stores and partially writes when out of bounds

  WebAssembly/binaryen#9180 · Filter by author tamaroning opened on Oct 1, 2026

• DWARF line table rows with line 0 are dropped, so code gets attributed to the wrong line

  WebAssembly/binaryen#9164 · Filter by author deadprogram opened on Sep 28, 2026
  1

• Remove unnecessary null pointer checks

  WebAssembly/binaryen#9135 · Filter by author elfring opened on Sep 22, 2026
  1

• Exact Type Precision vs Optimization Cost

  WebAssembly/binaryen#9133 · Filter by author ArkadySkv opened on Sep 22, 2026

• Complete the ChildTyper migration of validator child-type checks

  WebAssembly/binaryen#9123 · Filter by author ArkadySkv opened on Sep 20, 2026

• ChildTyper constraints drop sharedness, blocking validator migration

  WebAssembly/binaryen#9122 · Filter by author ArkadySkv opened on Sep 20, 2026

• Incomplete analysis for the states of global integer variables that does not eliminate excessive equality checks

  WebAssembly/binaryen#9086 · Filter by author alex28sh opened on Sep 9, 2026
  2

• More precise livenes analysis for locals under Asyncify

  WebAssembly/binaryen#9038 · Filter by author sbc100 opened on Aug 24, 2026
  5

• Most lit/help tests fail with new python-filecheck

  WebAssembly/binaryen#9018 · Filter by author rathann opened on Aug 19, 2026
  3

• ctor-eval/flatten_overflow.wast lit test fails on x86 32-bit

  WebAssembly/binaryen#9006 · Filter by author rathann opened on Aug 15, 2026
  2

• wasm2c from binaryen conflicts with wasm2c from wabt

  WebAssembly/binaryen#9002 · Filter by author rathann opened on Aug 13, 2026
  4

• Parse bug with extra non-nullable br_on_cast values

  WebAssembly/binaryen#8949 · Filter by author tlively opened on Jul 29, 2026

• Fuzzer generates invalid code for table initializers

  WebAssembly/binaryen#8911 · Filter by author stevenfontanella opened on Jul 15, 2026
  1

• Investigate why wasm-merge + wasm-opt output is larger than the corresponding monolithic module processed with wasm-opt

  WebAssembly/binaryen#8910 · Filter by author bashor opened on Jul 15, 2026
  1

• wasm-opt [parse exception: popping from empty stack (at 0:543)]

  WebAssembly/binaryen#8896 · Filter by author vapier opened on Jul 12, 2026
  2

• Recognize table initialization code in start function and be able to devirtualize based on it

  WebAssembly/binaryen#8869 · Filter by author mkustermann opened on Jun 26, 2026
  4

• Missing validation error

  WebAssembly/binaryen#8785 · Filter by author mkustermann opened on May 28, 2026
  1

• Assumptions for public types under --closed-world

  WebAssembly/binaryen#8754 · Filter by author stevenfontanella opened on May 21, 2026
  11

• Asyncify produces invalid IR for inner passes

  WebAssembly/binaryen#8753 · Filter by author stevenfontanella opened on May 21, 2026