sloppy-implicit-global-write.js:5:1 - error SC1091: writing the undeclared name 'implicitGlobal' in a JavaScript source is not supported yet

  4 | // names the Node-island route the sloppy semantics need (plan D-2/D-5).
  5 | implicitGlobal = 42;
    | ^~~~~~~~~~~~~~
  6 | console.log(implicitGlobal);

  hint: a write to an undeclared name has no native lowering: sloppy mode makes it a property on Node's global object, which a native binary has none of, and strict mode makes it throw; declare the name, or keep the module in a Node island (sloppy-mode programs route there)