message: Add test for debug-crash.
  This also was a wrong-code bug (I think), but we can't yet write tests for those.
diff: @@ -18,5 +18,23 @@ fn crash_return_with_float_on_stack() {
  "#;
  let wasm_binary = wat2wasm(MODULE.as_bytes()).expect("WAST not valid or malformed");
  let module = compile_with(&wasm_binary, &get_compiler()).unwrap();
  - let instance = module.instantiate(&imports! {}).unwrap();
  + module.instantiate(&imports! {}).unwrap();
  +}
  +
  +#[test]
  +fn crash_select_with_mismatched_pending() {
  + const MODULE: &str = r#"
  + (module
  + (func (param f64)
  + f64.const 0x0p+0 (;=0;)
  + local.get 0
  + f64.add
  + f64.const 0x0p+0 (;=0;)
  + i32.const 0
  + select
  + drop))
  +"#;
  + let wasm_binary = wat2wasm(MODULE.as_bytes()).expect("WAST not valid or malformed");
  + let module = compile_with(&wasm_binary, &get_compiler()).unwrap();
  + module.instantiate(&imports! {}).unwrap();
  }
  