unreachable: Wasm text instruction
unreachable is used to denote a point in code that should not be reachable.unreachable is an unconditional trap: in the case where anunreachable is reached and executed, the instruction traps.
Try it
(module (func (export "throw") unreachable ))const url = "{%wasm-url%}";await WebAssembly.instantiateStreaming(fetch(url)).then((result) => { result.instance.exports.throw(); // Expected output: RuntimeError: unreachable});Syntax
wat
unreachable| Instruction | Binary opcode |
|---|---|
unreachable | 0x00 |