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JS interop fuzz bug with GTO and externref

Status: Open.

#9026 In WebAssembly/binaryen;

· kripken opened on Aug 20, 2026

Most lit/help tests fail with new python-filecheck

Status: Open.

#9018 In WebAssembly/binaryen;

· rathann opened on Aug 19, 2026

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

Status: Open.

#9006 In WebAssembly/binaryen;

· rathann opened on Aug 15, 2026

wasm2c from binaryen conflicts with wasm2c from wabt

Status: Open.

#9002 In WebAssembly/binaryen;

· rathann opened on Aug 13, 2026

wasm-opt constraint analysis assertion failed (MaxBinaryActions)

Status: Open.

#9001 In WebAssembly/binaryen;

· mcost45 opened on Aug 13, 2026

Non-natural alignment should fail to validate for atomic instructions

Status: Open.

#8962 In WebAssembly/binaryen;

· stevenfontanella opened on Jul 31, 2026

Parse bug with extra non-nullable br_on_cast values

Status: Open.

#8949 In WebAssembly/binaryen;

· tlively opened on Jul 29, 2026

Fuzzer generates invalid code for table initializers

Status: Open.

#8911 In WebAssembly/binaryen;

· stevenfontanella opened on Jul 15, 2026

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

Status: Open.

#8910 In WebAssembly/binaryen;

· bashor opened on Jul 15, 2026

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

Status: Open.

#8896 In WebAssembly/binaryen;

· vapier opened on Jul 12, 2026

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

Status: Open.

#8869 In WebAssembly/binaryen;

· mkustermann opened on Jun 26, 2026

Heap2Local bug on cmpxchng

Status: Open.

#8850 In WebAssembly/binaryen;

· kripken opened on Jun 16, 2026