Step into a function that starts with a non-breakable opcode (i.e. block), then step from there. See https://crbug.com/1137710. Running test: test Setting up global instance variable. Got wasm script: wasm://wasm/4658c40e Setting breakpoint on offset 44 Running main function. Script wasm://wasm/4658c40e byte offset 44: Wasm opcode 0x10 (kExprCallFunction) Debugger.stepInto called Script wasm://wasm/4658c40e byte offset 40: Wasm opcode 0x0b (kExprEnd) Debugger.stepInto called Script wasm://wasm/4658c40e byte offset 41: Wasm opcode 0x0b (kExprEnd) Debugger.resume called exports.main returned.